About Big Hero 6 Team

Big Hero 6 (team)

Big Hero 6 Information Feature films Big Hero 6 Members Hiro Hamada Baymax Honey Lemon Go Go Tomago Fred Wasabi Goal Protect the city of San Fransokyo Headquarters Hiro's garage, San Fransokyo

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“We didn't set out to be superheroes. But sometimes life doesn't go the way you planned. The good thing is, my brother wanted to help a lot of people and that's what we're going to do. Who are we?”

―Hiro Hamada, closing narration

Big Hero 6 is a superhero group from San Fransokyo in the 2014 animated film of the same name.
Originally a group of university students, the group was formed for the purpose of capturing the supervillain Yokai, the man responsible for the death of their friend (and Hiro's brother) Tadashi, and bringing him to justice. Thanks to the students' high intellect, the group built specialized suits based on the individual skills of each member, transforming themselves into high-tech superheroes. After not only stopping Yokai but also saving the city in effect, the team is coined "Big Hero 6" by the media and vow to protect San Fransokyo in honor of Tadashi.

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Members

“Do you feel it? You guys, do you feel this? Our origin story begins! We're gonna be superheroes!”

―Fred, on excitement of being a superhero

• Hiro Hamada (leader)
• Baymax
• Honey Lemon
• Go Go Tomago
• Wasabi
• Fred

Gallery

Early concept art of the team

About Tadashi Hamada

Tadashi Hamada Background information Feature films Big Hero 6 Animators Jason Figliozzi Voice Daniel Henney Designer Shiyoon Kim Inspiration Tomeo Takachiho Character information Full name Tadashi Hamada Personality Selfless, wise, bright, humorous, caring, responsible, plucky, mature, optimistic, hard-working, intelligent, innovative, brotherly, supportive, friendly, dedicated, inventive Appearance Tall, slender, fair skin, black hair, brown eyes Occupation Robotics Engineering student Inventor Alignment Good Goal To change the world for the better Home Lucky Cat Café, San Fransokyo Relatives Unnamed parents (deceased) Hiro Hamada (brother) Cass Hamada (aunt) Pets Mochi (cat) Allies Hiro, Baymax, Wasabi, Honey Lemon, Go Go Tomago, Fred, Robert Callaghan Enemies Mr. Yama Likes Helping others, his brother, his friends Dislikes Bot-fights, Hiro neglecting his own genius, upsetting his aunt Powers and abilities Intelligence Moped driving skills Fate Dies in a fatal explosion while trying to save Professor Callaghan (film) Gets sucked into a portal while trying to save Hiro (manga)[1] Quote "Unbelievable. What would Mom and Dad say?" "Hey, I'm not giving up on you." "Look for a new angle!" "Someone has to help."

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“People keep saying he's not really gone, as long we remember him. But it still hurts.”

―Hiro to Baymax about Tadashi

Tadashi Hamada is the older brother of Hiro Hamada in Disney's 2014 animated feature film Big Hero 6. A gifted robotics student at the San Fransokyo Institute of Technology, Tadashi is the creator of Baymax, the robotic Personal Healthcare Companion.
Tadashi's sudden death in a mysterious fire catalyzes the events of Big Hero 6, leading Hiro, Baymax and Tadashi's best friends to band together to investigate the "accident" and catch the culprit responsible for it.
He is voiced by Daniel Henney.

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Background

Tadashi Hamada is a brilliant inventor and the older brother of Hiro. Together, the two live with their aunt Cass in the beautiful city of San Fransokyo. Their parents died 10 years prior to the events of the film, growing up together in Cass' cafe and bakery. Tadashi was also a student at the San Fransokyo Institute of Technology and worked alongside his best friends Wasabi, Go Go Tomago, Honey Lemon and Fred under the guidance of their mentor--the world-renowned Professor Callaghan.
Aside from innovating and inventing, Tadashi spent his days with his little brother and best friend Hiro and often made attempts to convince the young prodigy to use his intellect to do great things. Under Callaghan's guidance and with the funding of San Fransokyo Tech, Tadashi now has the means to create useful technology that could change the world--an opportunity he eventually seizes to create Baymax.

Official Description

Tadashi is a good guy. He just is. He actually developed, built and programmed a state-of-the-art nursebot—a Healthcare Companion named Baymax that will likely help millions worldwide. But it's his role as big brother that makes Tadashi truly special. Every kid needs a guy like Tadashi looking out for him, and Hiro knows just how lucky he is to have him in his life.^[2]

Personality

Incredibly kind, encouraging and hard-working, Tadashi is considered the epitome of a great brother, nephew and student, always there when people need him. He has an energetic sense of humor and can be silly and excitable.
Tadashi is very hard-working and very intellectually gifted. He does not believe in "dead ends" and values hard work to accomplish goals. He also has a large understanding of health and medicine. Ever the optimist, he successfully balances this rising career in cutting-edge technology and providing moral and emotional support for his younger brother Hiro while keeping a good attitude and a happy smile. He also even appears to be athletic and he is known to have taught Hiro some karate; Baymax's statement that Tadashi was in 'excellent health' also indicates that he is physically fit.
As the only male figure in Hiro's life, he has carried the burden of responsibility from a young age, knowing that he had to lead Hiro and be a good role model. Having to care for Hiro alongside their aunt Cass has made Tadashi gentle and understanding, though as the big brother, he can still be rough on occasion. He is also not above scolding Hiro or becoming upset with him, getting angry at Hiro's unwillingness to try and make something of his life, showing a slightly frustrated side to his personality not seen anywhere else. He encourages Hiro to be the best that he can be and supports him in his endeavors. He was also sneaky, as he promised Hiro he would take him to a bot fight but in reality took him to his university, claiming he "needed to get something" before they headed off in order to get Hiro to come to his university and become interested in it while technically keeping his promise of "taking him to the bot fight" without actually doing it.
However, he was also shown to have a silly, goofy side to himself. When he introduced Baymax to Hiro and Baymax asked if he is experiencing any pain, Hiro asked "physical or emotional", causing Tadashi to comically pout. When Hiro ran out of ideas, he grabbed Hiro and shook him upside down in order to shake some ideas into his head and stated that Hiro needed to "look at things from a different angle"--a philosophy that Hiro eventually adopts as his own during the film. He was also excitable, as shown when he was happy after finally activating Baymax (after 84 tests) and ran around and kissed Baymax.
Tadashi also values his aunt; he does not like to make her upset and is appreciative for all she has done to raise them, especially having done it alone. His concerns extend to the general public, developing Baymax with the sincere hope that the healthcare companion would help people all over the world. He is dedicated to helping others no matter what the cost is to him--a statement undeniably proven when he makes the ultimate sacrifice in an attempt to protect his teacher.

Physical Appearance

Tadashi's hair in a family photo, from Hiro's Journal.

Tadashi is a tall, slender, slightly muscular young adult male of a larger build than others in his family. He is of mixed Japanese and Caucasian descent, which shows in his various facial features. He has large, warm brown eyes and neat black hair cut above his prominent ears. His face shape is different from those of his aunt and brothers, with a longer face, larger jaw and slightly larger nose.
His most notable physical trait is his preference for a black baseball cap with a red-and-gold San Fransokyo Ninja lettering on it. He is never seen without this cap in the film, except when he takes off his moped helmet, though it is also off in many family photos that can be seen.
Since he changes his clothes daily, he does not wear any one outfit for much longer than others. However, he owns many similar articles of clothing, only varying in color. He owns several blazers, crew neck t-shirts and cardigan sweaters, usually in the colors white, black, tan, red or various shades of green. He often wears mint-colored sneakers with white soles and shoelaces and occasionally carries a tan satchel across his shoulder.
When he introduces Hiro to his friends, he is wearing a white crew neck t-shirt with artwork of a ninja, along with a grey cardigan, brown pants rolled up around his ankles and his mint-colored sneakers. He wears the same shirt to bed that night, with green plaid pajama pants.
On the day of his death at the San Fransokyo Tech Showcase, he wears an olive green blazer over a black shirt, with a similar pair of rolled-up brown jeans. Before he runs into the burning building, his hat falls off of his head, which Hiro retrieves and keeps as a memento.

Role in the film

Tadashi and Hiro on their way to San Fransokyo Tech.

One night, in the city's illegal underworld, Hiro engages himself in a bot fight against a group of thugs; specifically the boisterous Mr. Yama. After facing a humiliating defeat, Yama seeks revenge by ordering his goons to attack the young genius, who is immediately rescued by Tadashi on his moped. The brothers make their escape as Tadashi reprimands Hiro on his actions, only to find themselves caught and arrested by the San Fransokyo police. Yama and his gang are forced to share a cramped cell with Tadashi, while Hiro has a separate cell to himself due to being a minor. Tadashi was not happy with this and silently glared at Hiro across from his cell for getting him into this situation. Fortunately, they're released on account of Cass, who scolds the two on the ride home. The incidents leaves Tadashi frustrated with Hiro's bot fighting obsession, and in hopes of sending him down a better path, takes his younger sibling to his school; the San Fransokyo Institute of Technology. There, Hiro meets Tadashi's closest friends, Tadashi's latest invention, Baymax, as well as Professor Callaghan; an aspiring master of robotics and Hiro's personal icon. The experience successfully manipulates Hiro into have a strong desire to attend the school.

Tadashi and Hiro bonding.

To gain acceptance, Tadashi suggests Hiro participate in the school's annual science fair. Should his invention and presentation impress Callaghan, he'll be allowed enrollment. Unfortunately, Hiro reaches a creative rut, until Tadashi steps in and advises he looks from a different angle. Tadashi's advice leads to the creation of the Microbots. On the night of the fair, Callaghan shows amazement at the sight of Hiro's latest invention, leading to the latter's acceptance into the school. After the successful presentation, Tadashi and Hiro have some time alone, during which the older brother congratulates the younger on his accomplishment, showing pride in the new path he's willing to take.

The last remains of Tadashi after the tragic incident.

Just then, a fire breaks loose at the school, and the brothers immediately rushes to action. Whilst most civilians managed to escape, Tadashi learns from a survivor that Professor Callaghan is still trapped inside the burning building. With no help around to save him, Tadashi volunteers his own life. A fearful Hiro immediately stops his brother, but reluctantly allows the decision upon seeing Tadashi's humanity and motivation to rescue his mentor. After rushing inside, the building violently explodes, killing Tadashi (even though his final moments are not shown, the junior novelization implies that he was crushed by a falling beam). After Tadashi's death, the people of San Fransokyo mourn his loss, whilst a heartbroken Hiro falls into depression.

"Tadashi is here."

Though mentioned several times in the events following his demise, Tadashi wouldn't appear again until after Hiro's anger and frustration consumes him, leading Baymax to show a series of footage (which was recording while Tadashi was in the process of building the healthcare companion) to comfort. In it, it is shown that Tadashi had spent multiple attempts testing and perfecting the robot, each time ending with a major failure. Although there were many major setbacks, Tadashi never gave up on building him. During the eighty-fourth test, Baymax was finally functional, causing Tadashi to express excitement for his success. With Baymax working properly, Tadashi stated his eagerness to now be able to help others with Baymax, especially when he would get to show Baymax to Hiro. Tadashi's inspiring words and loving ways throughout the footage successfully heals Hiro's damaged heart, and as such, the young prodigy vows to use his intellect to change the world for the better, which he does by defeating Yokai (the man responsible for Tadashi's death) and using the Big Hero 6 team to selflessly protect the city.
In the credits of the film, a newspaper shows a ceremony of a building dedication in Tadashi's name taking place, in which Hiro accepts the honor on his late brother. The building is most likely to be a replacement for the showcase hall that was intentionally incinerated by Professor Callaghan during the convention, which also took Tadashi's life.

Printed Media

An illustration of Tadashi in the book, Hiro and Tadashi.

Tadashi has appeared in a few books related to Big Hero 6, including novelizations, colouring books and the manga.
The prequel manga, Baymax, which is currently in serialization, describes Hiro and Tadashi's childhood and provides an alternate version of the film. Beginning with his first meeting with Hiro at his birth, the first chapter elaborates on Tadashi's opinion on growing up alongside Hiro and what he wants for Hiro's life. As children, Hiro is always seen as the smarter of the two despite his age, and Tadashi originally expresses slight jealousy, though he grows out of it with age. Overall, he decides to not give up and continues to work hard as he creates his greatest work, Baymax.
His death in the manga is entirely different from the film. Instead, he dies protecting Hiro from a portal that Yokai activates from underneath the robotics lab, pulling Hiro to safety while a loose pipe knocks him over the ledge. After confessing his pride and love for Hiro, he is sucked into the portal, and is never seen again (so far).
He is the center of the book Hiro and Tadashi, alongside his brother. The book gives more insight into the Hamada brothers' closeness and the importance the relationship has on Hiro, as they build an "awesome robot" for Professor Callaghan's class. According to the book, the brothers are always coming up with secret rules for each other (at least 457 of them), and mentions Tadashi as being the one who gives Hiro the journals he uses to brainstorm inventions. This is also exhibited in the Hiro's Journal book -- the first page includes a letter from Tadashi, telling him that to use the notebook because "every invention needs to start somewhere".
Tadashi also appears in the Big Hero 6 Golden Books, which are condensed versions of the film for small children. The Little Golden Book does not detail the circumstances of his death or Callaghan's involvement in it, mentioning him only as the creator of Baymax and having been lost in an accident at school. However, the Big Golden Book (written for slightly older children) discusses Tadashi and his death at length, calling him the "best brother ever".
In a few publications, he is mentioned to be eighteen years old during the events of the film.^[3][4]

Relationships

Hiro Hamada

“I wouldn't be here if it weren't for you so, you know, thanks for not giving up on me.”

―Hiro to Tadashi

Tadashi and Hiro.

Hiro is Tadashi's little brother, and likely the most important person in Tadashi's life. He and Hiro have also become best friends, considering their duo as an 'exclusive club', according the Hiro and Tadashi book. They like to keep secrets and make up rules that only the two can know. They've shared a bedroom presumably since they moved in with Cass 10 years ago, allowing Tadashi to always be there when Hiro needs him, academically or emotionally. Because they were raised together, no one knows Hiro's emotions and issues better than Tadashi, and vice versa. Tadashi was also the one who encouraged Hiro to be interested in robotics, and they are seen assembling a robot toy together in a family photo, as children. Hiro's health, happiness and well-being is of utmost importance to Tadashi, and he is disappointed when Hiro continues to bot-fight underground instead of trying to do something productive with his incredible intelligence. He not-so-subtly persuades Hiro to apply to SFIT and pursue a career in robotics alongside him, and is tremendously proud when Hiro succeeds.

Cass Hamada

Cass is Tadashi's over-worked but loving aunt. She has raised them for a decade since their parents died, although she admits she's not perfect. He hates making her upset, and tries his best to make her proud, encouraging Hiro to do the same.

Parents

Tadashi appears to be the only one with clear memory of his and Hiro's parents, being the older of the two. He still lives his life in consideration for what they would have wanted, and reminds Hiro of how disappointed they would be had they known he was participating in underground bot fights.

Baymax

“You're going to help so many people, buddy. So many!”

―Tadashi, after he successfully gets Baymax to work properly

Tadashi introduces Hiro to his creation, Baymax.

Tadashi is the creator of Baymax. Before completing him, Tadashi suffered from Baymax's unintentionally erratic and violent behavior, such as quickly jabbing into Tadashi's head with its fingers, shorting electrically (creating a burn hazard) or hurting his ears with high-pitched noise. As soon as Baymax functioned properly, however, Tadashi was ecstatic, humourously running around the room in a happy panic before asking it to scan him. Tadashi is incredibly hopeful at the existence of Baymax, hoping that someday the healthcare companion could help the sick and injured all over the world.
After Tadashi's death, Baymax must take his place as Hiro's emotional support, something Hiro doesn't initially want, nor does Baymax understand. Attempting to make sense of Tadashi's absence is also one of the first times Baymax deviates from his normal functionality. At one point, he calls Tadashi's name while looking at Tadashi's belongings, wondering where he is and when he will come back, something unusual for him at this point. He did not understand that Tadashi could be dead, as he had previously scanned him and calculated that Tadashi was in excellent health.

Wasabi, Go Go, Honey, and Fred

Wasabi, Go Go, Honey, and Fred were Tadashi's classmates and closest friends. They were shown to have a close bond and were regularly seen with one another outside of school. After Tadashi's death, the remaining group members took it upon themselves to watch over Hiro and eventually welcome him into their circle of friends. Not only that, they carried out Tadashi's hopes of helping the world by remaining members of the Big Hero 6 superhero team.

Professor Callaghan

Tadashi introducing Hiro and Professor Callaghan.

Professor Callaghan was Tadashi's professor and mentor at the San Fransokyo Institute of Technology. The two shared a unique relationship amongst the institute's crowd, as they showed a high level of mutual respect, bordering the lines of a father/son relationship. On Tadashi's side, the young prodigy admired Callaghan greatly for his aspiring ways and innovations in the world of science and technology. Like his mentor, Tadashi was shown to be an inspiring and wise innovator, especially towards Hiro and his friends. Judging by their interactions and similar outlooks on science and intellect, it can be implied that Tadashi learned such traits from Callaghan.
The strength of Tadashi's admiration for Callaghan was truly established moments before the former's death, as the young man was tragically killed trying to save his mentor. Unfortunately, the sacrifice was for naught, as Callaghan was the one responsible for setting the fire, which he did in order to cover the tracks of his crimes of stealing Hiro's microbots. When told Tadashi died on his account, Callaghan openly confessed to having no remorse for causing the tragedy, blaming Tadashi for his own demise and revealing his true, sinister nature. With this, while Tadashi obviously admired Callaghan, it is unknown whether or not Callaghan truly cared for Tadashi.

Quotes

• "You graduated high school when you were thirteen, and this is what you're doing?"
• "Bot-fighting is illegal, you are gonna get yourself arrested!"
• "You better make this up to Aunt Cass before she eats everything in the café."
• "I hope you've learned your lesson, bonehead."
• "When are you going to start doing something with that big brain of yours?"
• "Unbelievable. Ah, what would Mom and Dad say?"
• "Fred's the one who comes up with the nicknames."
• (Showing Baymax to Hiro for the first time) "This is what I've been working on."
• "Programmed with over ten thousand medical procedures, this chip is what makes Baymax, Baymax."
• (To Hiro) "Hey, I'm not giving up on you."
• "Shaking things up! Use that big brain of yours to think your way out. Look for a new angle."
• (Fred: I haven't done laundry in six months. One pair last me four days-- I go front, I go back, I go inside out, then, I go front and back.) "Wow. That is both disgusting and awesome."
• (To Hiro) "Welcome to nerd school, nerd."
• (To Hiro) "No, I was just going to tell you your fly was down for the whole show."
• "Callaghan's in there, someone has to help." (last words to Hiro)
• (On a recording from Baymax) "This is Tadashi Hamada, and this is the first test of my robotics project."
• (To Baymax) "I'm not giving up on you. You don't understand this yet, but people need you. So let's get back to work."
• "This is Tadashi Hamada and this is the 84th...test. What do you say, Big Guy? (Baymax: Hello, I am Baymax, your personal healthcare companion.) It works...it works! Oh, this is amazing! You, you work. I knew it, I knew it, I knew it! I KNEW it! You work. I can't believe it! I can't be-Okay, all right, big moment here. Scan me. (Baymax: Your neurotransmitter levels are elevated, this indicates that you are happy.) I am. I really am. Oh man, wait 'till my brother sees you. You are going to help so many people, buddy. So many. That's all for now. I am satisfied with my care."

About Hiro Hamada

Hiro Hamada Background information Feature films Big Hero 6 Video games Disney INFINITY 2.0 Big Hero 6: Battle in the Bay Big Hero 6: Baymax Blast Big Hero 6: Bot Fight Park attractions World of Color Disney Dreams! Animators Nathan Engelhardt Trent Correy Voice Ryan Potter Designer Shiyoon Kim Jin Kim Inspiration Hiro Takachiho from the original Marvel comic Character information Full name Hiro Hamada Other names Hiro Zero (referred to by Mr. Yama) Little Man (referred to by Wasabi) Genius (referred to by Go Go) Bonehead (referred to by Tadashi) Little College Man (referred to by Aunt Cass) Personality Fast-talking, brazen, intelligent, ambitious, cocky, shy, clever, sassy, awkward, dauntless, free-spirited, brave, sarcastic, impulsive, caring, optimistic, hopeful, symphatetic Appearance Slender, five feet tall, fair skin, messy black hair, brown eyes, a slight gap between his teeth. Occupation Bot-fighter (formerly) Student Superhero Alignment Good Affiliations Big Hero 6 Goal To get into the San Fransokyo Institute of Technology (succeeded) To avenge Tadashi (formerly) To protect the city of San Fransokyo Home San Fransokyo Relatives Unnamed parents (deceased) Tadashi Hamada (older brother; deceased) Cass Hamada (aunt) Pets Mochi (cat) Allies Baymax, Tadashi, Honey Lemon, Wasabi, Fred, Go Go Tomago, Cass, Alistair Krei, Heathcliff, Mochi, Robert Callaghan (formerly) Enemies Yokai, Mr. Yama, Alistair Krei (formerly) Likes Robotics and technology, robot fights, his family and friends, Baymax's comforting ways, gummy bears, hot wings Dislikes Failure, the mere thought of Tadashi's death, Callaghan's betrayal, nagging, being pestered, Mr. Yama, peanuts Powers and abilities Intelligence Weapons Battle gear Microbots Fate Vows to protect San Fransokyo as a superhero alongside his friends in honor of Tadashi Quote "You're gonna need some upgrades." "I'm satisfied with my care." "No, we can be way more." "Tadashi's gone!"

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“We didn't set out to be superheroes. But, sometimes, life doesn't go the way you planned. The good thing is, my brother wanted to help a lot of people. That's what we're gonna do!”

―Hiro's closing narration

Hiro Hamada is the main protagonist from Disney's 2014 animated feature film Big Hero 6. He is the founder and leader of Big Hero 6, a team of young superheroes whose goal is to protect the city of San Fransokyo. He is based on Hiro Takachiho from the Marvel comic of the same name.
He is voiced by Ryan Potter.

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Background

Official Description

Robotics prodigy Hiro Hamada has the mind of a genius—and the heart of a 14-year old: his state-of-the-art battle-bots dominate the underground bot fights held in the dark corners of San Fransokyo. Fortunately, big brother Tadashi redirects Hiro's brilliance, inspiring him to put his brain to the test in a quest to gain admission to the San Fransokyo Institute of Technology. When a tragic event changes everything, Hiro turns to a robot named Baymax, and they form an unbreakable bond—and two-sixths of a band of high-tech heroes on a very important mission.^[1]

Personality

Hiro Hamada is a young boy with intelligence far beyond his years. Because of this, he can be rather brazen and cocky (especially when he was seen to be bored on during his bot fight with Mr. Yama), but never to the point of arrogance. He spends much of his time using his technology to win money through illegal bot fights (although he claims that bot-fighting isn't illegal, but betting on it is. Regardless, he still does it illegally), something he prides himself on, though his older brother Tadashi heavily disapproves. Whilst Tadashi feels his brother has a greater purpose and should attend college, Hiro believes he holds the knowledge of all that there is to know in the world, showing a strong sense of pride.
Despite his bold nature, Hiro has a much softer side to him, as he's shown to be rather shy in front of crowds and during the process of making new friends, as well as awkward at times. Even so, his compassion is mostly seen when dealing with his older brother Tadashi who, despite his brotherly nagging, holds a special place in Hiro's heart as the latter's best friend and inspiration. When with Tadashi, Hiro's true colors are shown; showing him to be free-spirited, innocently sassy, warm and ultimately very loving and appreciative. Such aspects wouldn't be seen again until the void left by Tadashi's demise is eventually filled by the lovable Baymax, who cares for Hiro in the same sense, forming a strong companionship.
However, underneath his kind heart lies a darker core. At certain points during the movie, the boy genius would allow his anger to cloud his better judgement and commit acts normally out of the question. He is similar to Yokai (the villainous mastermind responsible for the death of Tadashi) in this respect, as both experienced the loss of a loved one, thus mutilating their hearts to the point where they sought revenge against the wrongdoers responsible, going as far as conscious murder. However, what separates the two and ultimately classifies Hiro as a hero and Yokai as a villain is the fact that, unlike Yokai, Hiro not only learns the error of his ways, but he makes a serious effort to right the wrongs he's caused as quickly as possible. Such revelations are mostly due to the comforting nature of Baymax, the legacy of Tadashi and the support of his closest friends, resulting in a newly-reformed young prodigy, who values the lives of all human beings and refuses to carry out acts of justice through the use of violence and murder.
As time would move on following the events of Tadashi's death, Hiro would slowly shape into a heroic, wise and inspirational leader, following in his brother's footsteps. Such traits passed down include Tadashi's philosophy of "looking for a new angle", as well as the devotion to do whatever necessary to help others and make the world a better place for all, especially the innocent and deserving. As mentioned above, Hiro would notably organize the Big Hero 6 team, vowing to protect the city of San Fransokyo in order to fulfill Tadashi's lifelong dream of helping others.

Physical appearance

Hiro is a young boy. According to official sources, he is 5'0" (152 cm) in height and rather slender. He can often be found in a blue hoodie jacket, a red shirt with a robot on it, long dark beige capri shorts and dark brown trainers with yellow laces. He is fair in skin and has brown eyes and messy black hair. His eyelashes and eyebrows are somewhat thick and his eyes are a rounded almond shape. When he smiles or opens his mouth, a gap in his teeth can be noticed along with a slight overbite.
Hiro's super-suit is made of primarily indigo with red accents and black armor, with black clothing underneath that covers most of his body up to his knees, along with steel-toe black sneakers. On his suit are red magnetic pads, used to carry onto Baymax's armor for transportation and battle purposes.

Powers and Abilities

Unlike the rest of the team, Hiro's armor lacks any real ability, as his true power lies within his genius. As mentioned above, however, his suit enables him to hold onto Baymax with magnetic pads whenever the robot takes flight with him aboard, as well as partial protection from destruction. His helmet is also equipped with a communication device, enabling him contact with the rest of the team members despite their distance, if any.
With his vast intelligence, Hiro has the power to create various new concepts and inventions, often varying in scale, from a small yet powerful battle bot to a state-of-the-art super suit. Not only was he able to "upgrade" both himself into a crime-fighting vigilante, but also Baymax as well as his four closest friends, creating a series of powerful battle suits with various powers and abilities; making them a force in their own rights.
Other inventions notably created by Hiro include the Microbots (which were primarily used throughout the film as Yokai's source of power), Baymax's original battle suit (which was equipped with karate action), programming chips capable of enhancing (for better or worse) the knowledge and personality of a robot and Baymax himself, whom the boy genius was able to recreate in every little detail at the end of the film.

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Role in the film

A subtly cocky Hiro calmly engaging in an illegal bot fight.

Hiro Hamada is a young prodigy living in the high-tech city of San Fransokyo along with his aunt Cass and older brother Tadashi, who wants Hiro to become a productive member of society.
Despite his high intelligence, Hiro spends his time participating in underground bot fights throughout the city, which has frequently led to Tadashi having to bail him out of tough situations. On one particular night, Hiro takes part in an illegal bot fight against champion Mr. Yama and leaves the battle victorious. Out of spite, Yama and his goons attack the boy, who is immediately rescued by Tadashi. Though they escape Yama and his thugs, the two brothers, along with everyone else involved in the illegal bot fights, are caught by the police and arrested. Hiro and Tadashi are released that same night on account of Cass, who takes them home, scolding them along the way. The two are able to bypass punishment, but a frustrated Tadashi scolds Hiro on his bot-fighting obsession, wanting him to put his intelligence to better use.

Hiro meets Baymax for the first time.

Hiro scoffs at the idea and makes an attempt to join another bot fight. Tadashi offers a ride, but instead takes his brother to his school, the San Fransokyo Institute of Technology. There, Hiro meets Tadashi's closest friends — Honey Lemon (a hyperactive chemistry expert), Go Go Tomago (a sassy adrenaline junkie), Wasabi (a neurotic neat freak) and Fred (a hopeless fanboy with a love of comics and Japanese Kaiju). Though Hiro is shy and quiet throughout the introductions, he's secretly amazed by the institute, finding the inventions breathtaking, though he doesn't admit so just yet. After meeting the team, Tadashi takes Hiro to his lab, where he introduces him to Baymax (a squishy white robot, programmed to be a personal healthcare companion and created as a means to heal the sick and injured). Tadashi explains Baymax was a creation meant to help people around the world and is additionally explained to be programmed by a special healthcare chip which, according to him, makes Baymax who he is. After the introduction, the two run into Professor Callaghan, a world-renowned robotics expert, mentor of Tadashi and Hiro's personal idol. With the help of Tadashi, Callaghan cunningly convinces Hiro to enroll in the Institute, claiming the school is a place where the boundaries of robotics are pushed and geniuses put their brains to the test in order to shape the future. Callaghan's words instantly strike Hiro and after departing the school, he confesses his burning desire to join the Institute much to Tadashi's happiness.

Hiro presents the Microbots.

According to Tadashi, the school holds an annual convention, where up-and-coming geniuses are meant to showcase new creations. Those who impress Callaghan are accepted into the school. Tadashi advises Hiro to concoct a creation to do just that, but the boy-genius instantly hits a block of thought and nearly gives up. Tadashi restores his brother's faith by assisting him in enhancing his thought process, eventually leading to Hiro's breakthrough. After a long period of work and planning, with the help of Tadashi, Go Go, Wasabi, Honey and Fred, Hiro creates the Microbots--miniature robots capable of forming anything that comes to mind through the use of a telepathic headband transmitter. Hiro takes his inventions and showcases them at the convention. Though nervous at first, Tadashi eases his little brother, resulting in a fantastic showcase that thoroughly impresses both Callaghan and famous tech-guru Alistair Krei. Krei offers Hiro vast wealth in exchange for ownership over the Microbots. Callaghan interferes with the offer by accusing Krei of using technology and science for selfish reasons, advising Hiro to deny the offer. A frustrated Krei leaves the scene while Callaghan congratulates Hiro on his success by granting him admission into the school.

Hiro looks upon the horrific damage.

In celebration, Cass offers to take Hiro, Tadashi and their friends back to the cafe for a free dinner, though Tadashi and Hiro separate to have some alone time. Once they're alone, Tadashi congratulates his younger brother on his success, proud to see him use his genius for bigger things in life. Suddenly, however, the school's fire alarm goes off, prompting Tadashi and Hiro to rush to the chaos. There, they see civilians escaping the showcase hall, which was mysteriously set ablaze. One woman informs the boys that Callaghan is still inside the burning building and Tadashi decides to go in after him. Hiro tries to stop him, but Tadashi rushes inside, not willing to risk losing Callaghan. Hiro then attempts to follow, but before he's able to, the building violently explodes, rendering him unconscious and killing both Tadashi and presumably Callaghan. A funeral and memorial are held, and Hiro falls into deep depression at the loss of his brother and best friend. Cass tries to comfort her nephew, but to no real avail. As such, Hiro remains alone in his room, ignoring both Cass' attempts to cheer him up and his equally-saddened friends.

Baymax returns.

One day, Hiro accidentally stubs his toe and his pain summons Baymax, who was originally thought to be out of commission. Baymax explains he heard the sound of distress and offers assistance. Hiro denies his offer, and tries to deactivate the bot, only to accidentally stumble upon one of his Microbots, which is still active and trying to reunite with the other bots. Hiro, thinking that the rest of his Microbots and the transmitter were destroyed in the fire, ignores the bot's activity, believing it to be malfunctioning. Baymax, however, takes notice of this and acknowledges it, only to have Hiro sarcastically order Baymax to find out where the bot is trying to head, which the robot takes literally and does just that. Hiro chases after a wandering Baymax through the city and the two eventually find themselves at an abandoned warehouse. The two break in and they soon stumble upon a machine creating millions of Microbots. As Hiro ponders on the mysterious discovery, the Microbots rise and attack. Hiro and Baymax evade them hastily and eventually encounter a dark, masked figure named Yokai; the man responsible for the theft of the Microbots. The masked man pursues the duo, but they eventually escape at the last minute, immediately heading to the police station to report the attack.

Hiro scanning Baymax in preparation for his oncoming upgrades.

The two give their claims to Officer Gerson, who finds their story to be rubbish, thus denying them lawful assistance. Just then, Baymax begins to lose battery, forcing Hiro to leave the station and return home to have the robot charge. After sneaking past an oblivious Aunt Cass, Baymax begins to charge and Hiro takes a breather from the exhausting day. Just then, Baymax acknowledges Tadashi's disappearance, asking for his whereabouts. Hiro reveals Tadashi's unfortunate demise, but the mention of the fire being an accident sparks an epiphany. After the encounter with Yokai, Hiro realizes that the fire was no accident and recruits Baymax into helping him take down the masked culprit, wanting to avenge his brother's death. As such, Baymax is given a few upgrades, including a super-suit equipped with karate-like battle programming and a new programming chip, which gives him such abilities. After his new upgrades are put to the test, the two head out to find and capture Yokai. They arrive at the warehouse, only to find it vacant. However, using the last Microbot to track him, Hiro and Baymax are led to the docks, where they find the demonic Yokai emerging from the fog with a massive piece of technology. The two go into silent hiding until Honey, Go Go, Wasabi and Fred arrive, having followed the two there after spotting them snooping about the city alone.

Hiro looking into the eyes of Yokai as he and the team evade the masked villain.

Hiro urges them to leave, until the group is attacked by Yokai. Baymax tries to battle the masked villain, only to be thrown onto the top of Wasabi's van. The gang retreats from the scene with Yokai immediately following behind them, leading into a chase throughout the city. Yokai makes several attempts to kill the team, but luckily, with Go Go's reckless driving, they manage to escape by driving off a ledge and into the bay, having Yokai believe them to be dead, thus promoting him to vanish once again. Baymax manages to rescue the team and bring them back to shore and hiro suggests they needed a place to rest for the night, to recover, the group heads to Fred's mansion home. There, they ponder on the true identity of Yokai and how to find him before Baymax reveals that he scanned the masked man's body, allowing them to track him down via body temperatures and other health-related attributes. Before the mission to bring Yokai to justice begins, Hiro decides to upgrade both himself and the rest of the team, believing they'd have a much better chance if they all join together as superheroes.

Hiro and Baymax's first flight throughout the city.

After some scientific modifications and training, the group of friends become the team "Big Hero 6", bent on taking down Yokai. To do so, the team believes his mask is his source of power and the objective is to retrieve the mask to cease his control over the bots. Baymax is the last to be upgraded and after his new super-suit is revealed, he and Hiro take a test flight for the first time throughout the city, eventually landing on one of the air balloons towering over the city and overlooking a sunset. Hiro and Baymax take the time to relax and bond for a short moment, which brings happiness to the boy. Realizing this, Baymax asks Hiro if he's satisfied with his care, as his true objective throughout their adventure is to ensure Hiro's happiness and satisfaction, claiming Hiro to be his patient. Hiro denies Baymax's suggestion and returns to the matter at hand.
After scanning the city to find a match to Yokai's health information, Baymax discovers a match on an island not far from the mainland. The team heads to the area, which is revealed to be an abandoned facility. There, they find a machine in the process of restoration, but are unable to uncover what it is exactly. Soon enough, their snooping leads to a room with recordings taking place in the facility. After watching, they learn that the facility originally belonged to Alistar Krei and the machine was a portal meant to enhance transportation. The test subject, a woman named Abigail, was the first to try it out, but as she did, the machine malfunctioned. Instead of calling off the procedure, Krei insisted that they move forward, resulting in a tragic accident that left Abigail lost in the portal and apparently killed by the machine's destruction. The incident results in the closure of Krei's facility and the team then comes to the conclusion that Krei is responsible for stealing the Microbots in hopes of rebuilding his portals.

An enraged Hiro ordering Baymax to kill Callaghan.

Just then, Yokai returns and attacks once more. A battle follows and in the process, Hiro accidentally removes the villain's kabuki mask. Yokai's true identity is then revealed to be Professor Callaghan. Callaghan confesses his crime of stealing the Microbots and reveals that he used them to escape the fire alive and unharmed. A heartbroken Hiro reveals that Tadashi died trying to save the professor, but Callaghan merely responds by blaming Tadashi for his own death. Furious, Hiro orders Baymax to kill Callaghan. Baymax denies such an action, explaining he's unable to bring harm to a human being, but Hiro, blinded by hatred and grief, removes the robot's healthcare chip, leaving only his programming of battle and destruction, thus sending him on a violent, mindless rampage in an attempt to kill the professor. Seeing this, Go Go, Fred and Wasabi try to fend off the bot and, in the mix of the chaos, Callaghan manages to escape.

Hiro crying tears of joy as recordings of Tadashi comfort him.

Luckily, Honey recovers Baymax's healthcare chip and restores the robot to his original peaceful settings. Realizing what he's done, Baymax apologizes to the team for causing harm, but Hiro berates them, blaming them for Callaghan's escape. The team retorts by explaining that the plan was never to kill Callaghan, but instead, to merely apprehend him. Leaving the team on the island out of anger, Hiro and Baymax return home to recover Baymax's suit. Baymax talks to Hiro about the situation of killing Callaghan, asking if his death would appease the boy. Instead of answering, with his mind clouded by thoughts of fury, revenge, sadness and the loss of Tadashi, Hiro breaks down in tears. Baymax comforts him by showing him videos of Tadashi, which he recorded during his creation process. Tadashi's presence and loving words bring enlightenment to Hiro, who thanks Baymax for his comfort. Honey, Go Go, Fred and Wasabi soon arrive as well. Instead of being upset with Hiro, they, too, comfort the boy, he says he is sorry for yelling at them and they understand that his actions were only out of grief and vows to bring Callaghan to justice and his four teammates forgive him. Before they set out, the team shows Hiro a recording they found, which reveals that Abigail was the daughter of Callaghan and the entire goal behind his villainy is to extract revenge on Alistar Krei.
The next day, Alister Krei is in the middle of an important showcase, just as Yokai arrives and captures him. Yokai reveals himself to be Callaghan, and the villainous professor subsequently reveals his plot to use the newly-recreated portal to destroy both Krei's new building and Krei himself. Alistar tries to talk sense into the villain, explaining the incident with Abigail was an accident, but Callaghan ignores him and proceeds with his plot. Just then, Hiro and the team arrives on the scene. Instead of immediate attack, Hiro tries to sympathize with the professor, explaining the fact that extracting revenge isn't the way to handle his daughter's death, but Callaghan's fury gets the better of him, and his plans proceed. Hiro and the others battle the villain, aiming for Callaghan's mask, but Callaghan soon gets the upper hand with the help from the Microbots and leaves the team members to die as his plot is set in motion. As Hiro is being pulled towards the portal, his distressed team members calls to him for help, while at the same time, he sees some Microbots being sucked into a portal, giving him a new idea. Hiro then uses the words of wisdom from Tadashi to successfully guide each of his friends to safety.

Hiro spares Callaghan's life.

After being rescued by Baymax and rejoining the others, Hiro relays his new plan, instructing the team members to take out the Microbots and get them sucked into the portal to eliminate Callaghan's source of power, whilst he and Baymax take on the villain, themselves. Hiro and Baymax fly to attract Callaghan's attention, making him fire towers of Microbots in their direction. Dodging the Microbots, the two fly the point where they are almost sucked into the portal, from where Hiro orders Baymax to dive and break apart the Microbot formations to send them into the portal. Eventually, Callaghan captures the duo and prepares to make the killing strike, only to find that he has run out of the remaining available Microbots, thus rendering him powerless and vulnerable. With this revelation, Hiro and Baymax break free of their confinement and launch towards the villain. Fearfully, Callaghan prepares for his supposedly oncoming demise, but much to his shock, Hiro decides to spare his life, wanting to follow the moral code set by Baymax. Instead, Hiro and Baymax swipe the mask of Yokai and smash it into smithereens, causing Callaghan to finally (and permanently) lose control of the Microbots.

Hiro bidding farewell to Baymax.

With his plans foiled and power-stripped, the team apprehends Callaghan, but Baymax senses life within the portal, though the being is said to be in hyper-sleep. Baymax and Hiro realize that it must be Abigail and the two journey inside to save her. The two soon find Abigail, asleep in her capsule, and as they make their escape, some of the debris from the destruction of Krei Tech strikes them, causing Baymax to lose most of his armor. Hiro reaches out for Baymax, who manages to grab ahold of his hand, but they both find that the portal is soon closing. Baymax decides to use his rocket-fist to send both Hiro and Abigail to safety, but Hiro realizes that this will result in the robot's sacrificial death with Baymax trapped in the portal and denies such a plan, not wanting to lose him. Baymax disregards his own safety to help of Hiro, reassuring his friend that he'll always be with him. Hiro then tearfully hugs Baymax as he bids him farewell, telling the robot that he is satisfied with his care. With these words, Baymax sends Hiro and Abigail off, leaving himself trapped in the portal and eventually destroyed. After Hiro and Abigail manage to make it out of the portal, seconds before it explodes, Hiro reunites with the others and reveals Baymax's demise. Soon afterwards, the police and paramedics arrive to care for Abigail and arrest Callaghan.

Hiro and Baymax, reunited.

Following these events, Hiro has made a tremendous recovery from his depression as he spends his days hanging out with Honey, Go Go, Wasabi and Fred. Finally joining San Fransokyo Tech as an official student, Hiro settles in Tadashi's old lab, where the young genius stores Tadashi's hat in his memory and Baymax's last piece of armor: his rocket fist, reminiscing of their time together fondly as he comes across it. Within the grasp of the fist, however, Hiro discovers Baymax's original programming chip (which contains both his personality and memories). After some work, Hiro is able to restore the robot, reviving him from his demise and reuniting at long last. The two rejoice in their reunion with a loving embrace and Hiro reassembles the Big Hero 6 team, dedicating themselves to protecting the city from any and all problems, thus finally putting his incredible potential to great use as Tadashi had always wanted.
During the credits, Hiro, along with Baymax, is seen hanging out around the city with his friends and watching television with Cass and Mochi. Newspapers show that Hiro has been awarded a grant from the university and the Big Hero 6 team performing heroic deeds around the city. Another newspaper shows a ceremony of a building dedication in Tadashi's name taking place, in which Hiro accepts the honor on behalf of his late brother.

Printed media

Hiro's story, relationships and overall character is further analyzed and developed in several printed stories.
The currently ongoing manga series Baymax, delves into Hiro's past, revealing his upbringing and relationship with Tadashi, prior to the events of the film. It is revealed that Hiro was dubbed a genius at a very young age (being able to solve a problem no one could have) and, as a result, he found himself bullied and beaten by a group of envious kids on occasion, though Tadashi would always come to his rescue, yet he'd lie and say that it wasn't on purpose. As he grew older, Hiro became increasingly antisocial, even growing distant from Tadashi. Nevertheless, the elder sibling made attempts to keep the bond between Hiro and himself strong by crafting fun inventions for them to share, such as a miniature airplane for two. With the latter, Hiro's enthusiastic side saw a resurgence, and together, the brothers spent their days side by side as scientific partners and best friends.
Hiro and Tadashi centers around the relationship shared by the Hamada brothers, where they are shown to share secret rules (at least 457 of them) and continuously joined together to concoct various inventions. It's also revealed that Tadashi supplied his younger brother with a journal, to keep track of his latest endeavors, which would tie into Hiro's Journal. This book focused on the inner thoughts of Hiro during the course of the film, including his excitement to join the ranks of San Fransokyo Tech, his devastation over the loss of Tadashi, and more; all told by written journal entries and photographs.
Hiro's adventures are also expanded on in a Dutch magazine print centering the film and containing several short stories centering the young genius and his team. For example, Tech Nightmare takes place during the course of the film, in the midst of Hiro's creation of the Microbots in anticipation of San Fransokyo Tech's annual science fair. Adventurous Imagination takes place after the events of the film, where the team faces a new villain by the name of Dr. Rat. In the story, The Winning Robot, Yama returns to extract revenge.

Video games

Hiro has made numerous appearances in video games and applications, most of which are spin-off adventures of the film, including Big Hero 6: Baymax Blast and Big Hero 6: Bot Fight.

Disney INFINITY 2.0

Hiro and Baymax appear as playable characters in the second installment of the popular game, donning their superhero outfits.
Hiro's main source of power and attacks in the game are his Microbots, which, like in the film, can be used in combat, creating impressive damage to enemies.
Aside from that, Hiro also has the ability to ride atop Baymax, being one of the few characters in the game with the ability to ride on another playable character (the other being Rocket Raccoon from Guardians of the Galaxy).
Hiro can additionally use booster jumps for super-stealth spying purposes.

Big Hero 6: Battle in the Bay

Taking place after the events of the film, San Fransokyo falls under the attack of a battle bot invasion, at the hands of Mr. Yama, who seeks vengeance on Hiro for humiliating him and "usurping" his bot-fighting championship. With this, Hiro and the team band together to defeat the villain.

Disney Parks

Hiro and Baymax, posing for a photo at the Disney parks.

From November 2014 to early 2015, Hiro and Baymax appeared as meetable characters to promote the film at The Magic of Disney Animation in Disney's Hollywood Studios and at the Starcade in Disneyland.^[2]
Hiro also makes a cameo appearance in the 2014 rendition of World of Color: Winter Dreams alongside Baymax, as well as in the Disneyland Paris show Disney Dreams!.

Relationships

Tadashi Hamada

Hiro and Tadashi.

Tadashi is Hiro's older brother and was the most important person in Hiro's life, even after his death. Because their parents died when he was at a young age, Hiro has always looked to his older brother for guidance and advice. They were best friends and even had a set of rules they came up with that only they knew (according to the book, Hiro and Tadashi). They've shared a bedroom since they moved into their Aunt Cass's cafe but don't seem to mind and enjoy each other's company. Tadashi has always been there for Hiro whenever he needed him and the two balance each other well, as Hiro is more creative with his inventions while Tadashi is more practical and by the book as shown in Hiro and Tadashi. Tadashi sees the potential in Hiro and feels it is wasted when, after Hiro graduates from high school, he chooses to engage in a career in botfighting rather than continue his education and use his knowledge to improve the lives of others. Because Hiro is cut off from other people and because Tadashi has been with Hiro since the moment he was born and practically raised him, Tadashi understands Hiro the best out of everyone and was even the one to interest Hiro in robotics. He is also more able to persuade Hiro to do things, as shown when he manages to persuade Hiro to apply to San Fransokyo Institute of technology. He is kind and caring towards Hiro, but is also capable of being stern, demonstrated when he lectured Hiro about how he would get into trouble eventually for his bot fighting obsession and wanted him to stop. He was also goofy, as shown when he grabbed Hiro upside down to shake some ideas into his head. Nonetheless, he was encouraging of Hiro's intelligence and pursuit of robotics and was always there to protect him, as shown when he saved Hiro from Mr. Yama and his henchmen.
Tadashi's death had the greatest impact on Hiro, who fell into depression and refused to leave his room or eat after the incident. He also refused to attend the San Fransokyo Institute of Technology, despite his initial excitement to join. The death of his older brother also hardened Hiro's heart, and led him down a path of murderous vengeance, as seen when the boy manipulated Baymax's programming in hopes of killing Yokai, only to be stopped by his own friends.
When he tried to pursue the path of vengeance again, Baymax refused, as the latter knew this would not help Hiro and wouldn't be what Tadashi wanted. Hiro then watches clips of Tadashi building Baymax on the robot's video monitor and realizes Tadashi's goal was to help people and that he should do the same. This inspires Hiro to seek justice rather than revenge on Callaghan, make up with his friends, and continues to do good for the world by becoming a hero.

Cass Hamada

Cass embracing Hiro.

Cass Hamada is Hiro's and Tadashi's aunt. Hiro tends to stress her out and cause her to 'stress eat', due to his illegal bot fighting but she loves him nonetheless and vice versa. She is very supportive and proud of his abilities and was overjoyed when his Microbot exhibition won him an invitation to attend San Fransokyo Institute of Technology. Like Hiro she also mourned the passing of Tadashi. She would bring food to Hiro after Tadashi's death as Hiro fell into a severe depression and wouldn't leave his room for two weeks. She tried to encourage him to go to college because Tadashi would've wanted it and she wanted him to recover, but he remained silent and she decided to give him space. When Hiro left his room for the first time in two weeks and he lied about going to register for classes (he was really going to catch up to Baymax), she was overjoyed and hugged him. Overall, the two have a positive relationship and are close, especially since now they are the only known close relatives each has. However, it is interesting to note that Hiro did not want to tell her about Baymax and that he seems to be keeping his superhero persona a secret from her. This is most likely because she has been shown to worry about Hiro and disapproves of him doing dangerous activities (such as bot fighting) and after Tadashi's death she might forbid him to continue being a superhero as it would put him at risk.

His parents

Hiro's parents died ten years ago when he was only three. While he doesn't know much about them, he seems to be somewhat saddened at the mention of their deaths when Tadashi brings up how disappointed they would be if they knew he was bot-fighting. However, he tries to brush it off by claiming he doesn't really care what they would think of his behavior since they're dead.

Baymax

Baymax making an attempt to comfort Hiro on Tadashi's death.

Their relationship started out basic. Hiro was impressed with Baymax when first introduced, but when they reunited, he was less than thrilled as Baymax served as a reminder of Tadashi's death. However, because Hiro unintentionally summoned Baymax when the former expressed pain, the robot viewed Hiro as his patient, becoming solely devoted to him and unable to dismiss himself until the boy was satisfied with his care, vocally expressing that fact. This led Baymax to carry out every small order given by Hiro, no matter how literal or sarcastic, in hopes of improving the boy's health, as a result of his programming.
As time went on, however, Baymax's treatment towards Hiro began to change. As the robot began learning and understanding the basics of human emotion, a personal bond with Hiro began to form. His dedication towards his "patient" was no longer due to programming alone, but also because of a mutual love. In turn, Hiro grew to care for Baymax, who served as his ultimate form of comfort, a loving reminder of Tadashi and a nurturing companion. This is powerfully showcased when the duo found themselves trapped within Yokai's portal while trying to save Abigail. While Baymax was willing to sacrifice himself, Hiro strongly refused, as he didn't have the strength to lose him too. Nevertheless, he fought through his emotions using Baymax's lesson of overcoming loss, but not forgetting, allowing him to bid farewell to his companion, in addition to expressing his love for the first time through a hug.
Following these events and Baymax's eventual revival, the duo remains as close as ever, forming a brotherly relationship and spending their days beside one another through all events, including their mission to protect the world in Tadashi's honor.

Big Hero 6

Hiro with his closest group of friends.

Hiro was first introduced to the rest of his team (including Fred, Go Go Tomago, Wasabi and Honey Lemon) when he was tricked by Tadashi into visiting his college. He got to meet each of Tadashi's best friends and understand their individual quirks. He was impressed with all their inventions and was surprised by Fred with his mascot costume. Hiro then proclaimed his desire to apply at the institute and immediately began working to develop Microbots. During the time of and before the convention, he had become good friends with everyone.
After the death of Tadashi, the team members took Hiro under their wings, comforting him, supporting him, taking care of him and protecting him throughout the film in place of Tadashi, creating a close bond. This continued even after Baymax's undesired abandonment near the end of the film, as his friends helped him cope with yet another tragic loss.
With the support of his best friends, Hiro has come to spend his days happy as the group saves the world together.
Honey and Fred serve as enthusiastic supporters, Wasabi often watches out for Hiro's health and physical well-being and Go Go is arguably the closest to the boy, eventually taking on the role of a protective older sibling figure to him.

Yokai/Callaghan

Being a word-renowned scientist and personal mentor of Tadashi, Hiro initially looked up to Professor Callaghan, showing great respect and admiration towards him. Impressed by Hiro's knowledge, Callaghan was able to slyly convince the boy genius to give up botfighting to join the Institute to "challenge himself." It is possible he did this knowing of Hiro's intelligence and wanted him to apply to the school in hopes of stealing one of his inventions (though this is up for debate). Hiro impressed Callaghan at the convention with his Microbots and Callaghan warned him against accepting Krei's offer, manipulating him to say no. When Callaghan was "trapped" in the burning building, Tadashi went in to save him, losing his life in the process. When Hiro discovered Callaghan had started the fire to steal the Microbots and refused to save Tadashi (showing no concern for Tadashi's life or the fact he tried to save him) Hiro was willing to kill the professor as revenge and was only stopped by his team's intervention. However, after Baymax calms him down, he realized his beloved brother wanted to help people, not hurt them, thus realizing he needed to bring Callaghan to justice without harm.
Hiro soon learned from his teammates that Callaghan has suffered the loss of his daughter Abigail (thanks to Krei's misuse of the portal technology that led to her apparent death), and that Callaghan only stole the microbots as part of his true plan to get revenge on Krei. When Hiro confronted Callaghan once again, he tried to reason with him, admitting that he does feel sorry for him and understands the pain of loss, and wanted to give the same support his teammates provided him with. However, a bitter Callaghan, while he did show a hint of regret, refused to back down and battled the boy genius, in hopes of killing him. After destroying the Microbots, thus leaving Callaghan powerless, Hiro made the ultimate decision to spare the former professor's life, having set aside his thirst for vengeance in exchange for the moral codes of Tadashi and Baymax. Not only that, he also made the choice to risk his own life to successfully save Callaghan's daughter, after discovering she was still alive within the portal. Though Callaghan showed no forward gratitude towards the hero, he met his defeat through imprisonment, and presumably permanent separation from his only loved one, finally receiving punishment for all the damage he's done, as well as granting Hiro closure. However, Callaghan's expression at the end implies that he shows remorse for what he had done, ultimately realizing that what Hiro said is right about the consequences of getting revenge.
The emotional core of Big Hero 6 is driven by four key characters, their arcs, and the relationships they share with one another, being Hiro, Tadashi, Baymax, and Callaghan. As such, Callaghan serves as a omen of what Hiro would have become if he allowed his pain to consume him. However, unlike Callaghan, Hiro had friends and family who supported him through the ordeal and reminded him justice, not vengeance, is the answer.

Alistair Krei

The two have a basic relationship and are good acquaintances by the end of the film. Hiro first met Krei at the convention where he was showing off his Microbots and Krei immediately took an interest, hoping to buy the Microbots. However, Callaghan warned Hiro that Krei was known to cut corners and subtly manipulated Hiro to refuse. Krei was clearly disappointed.
Later when Fred assumes that Krei was Yokai, Hiro dimissed it, saying that he's too high profile, possibly implying that he is highly respectful of Krei's public image. When Hiro went to an abandoned Krei lab to track down Yokai, he initially grew to believe Krei was Yokai but was proven wrong after taking Yokai's mask and learning it was Callaghan. He also learned that Krei's teleportation experiment resulted in an accident that presumably killed Abigail which eventually turned Callaghan into Yokai. Despite finding this out, Hiro didn't seem to hold a grudge against Krei for indirectly creating Yokai as he tried his best to protect him from the masked villain. This could be because he knew it was an accident or because he wanted to stop Yokai's plan for vengeance. Krei was ecstatic when the Big Hero 6 team came to rescue him and even openly stated his love of Baymax, apparently growing a true liking for the team following these events.
When Hiro goes to save Abigail, Krei objects, likely showing concern for the boy's safety. However, Hiro assures him by telling him the same words that Tadashi had told him "Someone has to help". Krei seems to have learned his lesson and even built a showcase hall in Tadashi's honor, possibly as a way to make amends since he indirectly created Yokai and therefore was linked to Tadashi's death. Hiro accepted the honor on behalf of his late brother.
While the two don't have much interaction, it can be presumed Hiro holds no hard feelings against Krei and Krei is thankful for everything Big Hero 6 has done for him.

Quotes

The Disney Wiki has a collection of quotes said by Hiro Hamada.

Gallery

The Disney Wiki has a collection of images and media related to Hiro Hamada.