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    Tadashi Hamada 

Tadashi Hamada
"I'm not giving up on you!"
Voiced by: Daniel Henney
Appearances: Big Hero 6 | The Seriesnote 

Hiro's older brother and Baymax's creator.

  • Adorably Precocious Child: Implied to have been one in his youth. Tadashi had to mature at a very young age after his parents' death to be a good role model and father figure to his younger brother.
  • Adorkable: Best proven when Baymax's video shows how happy he is after finally activating Baymax (after 84 tries), prompting him to run around and kiss Baymax.
  • All-Loving Hero: Tadashi's concerns extend to the general public; he developed 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.
  • Always Second Best: Tadashi's voice actor Daniel Henney states that Tadashi "had his bad days" where he was jealous of Hiro's intellect and felt inferior to him, but pushed it away because supporting Hiro was more important.
  • Always Someone Better: It is implied that Hiro feels that he'll never be as great as Tadashi.
  • Anger Born of Worry: In the movie, after asking Hiro if he's okay and hurt as they escape Yama and his goons, Tadashi does a hilarious 180° and starts berating Hiro while driving on his moped.
    Tadashi: You okay?!
    Hiro: Yeah!
    Tadashi: Are you hurt?!
    Hiro: No!
    Tadashi: Then what were you thinking?! Knucklehead!
  • Arc Words: "Someone has to help!" becomes this to Hiro. Justified as they're Tadashi's last words and they had a great impact on Hiro.
  • Asian and Nerdy: Like Hiro, Tadashi is half White and half Japanese, and is a robotics student.
  • Augmented Reality: In "Obake Yashiki", Obake uses projections via contact lenses on Hiro to give him the impression Tadashi came back from the dead.
  • Badass Biker: Escapes Yama and his goons on his moped like a pro. Too bad he and Hiro get arrested soon after, though.
  • Back from the Dead: In the series episode "Obake Yashiki", or perhaps his spirit but this, unfortunately, is not the real Tadashi.
  • Big Brother Bully: Played for Laughs and subverted. He grabs Hiro by the ankles and shakes him around to get him to come up with a project for the tech showcase.
  • Big Brother Instinct:
    • He rushes in to save Hiro when he is about to be beaten up by Yama's goon's after Yama discovers that Hiro hustled him.
    • A blink-and-you'll-miss-it-moment, but Tadashi gives a Death Glare to Krei when he was gonna leave with the microbot (surely to steal it), and looks at Hiro protectively. See for yourself.
    • In the manga, Tadashi chased after some kids who were bullying Hiro.
    • In the series' Christmas Episode "The Present", a flashback scene shows a young Tadashi jumping Hiro to safety when his snow machine goes haywire.
  • Big Brother Mentor: For Hiro. As the only male figure in his little brother's life, he has carried the burden of responsibility from a young age, knowing he had to lead Hiro and be a good role model.
  • Big Damn Heroes: Arrives on his scooter with perfect timing to save Hiro from an angry Mr. Yama.
  • Big Man on Campus: According to Wasabi, Tadashi is considered "a legend" at SFIT.
  • Big Ol' Eyebrows: Like Hiro, Tadashi has bushy eyebrows.
  • Brainy Brunette: Tadashi has black hair, is a student at SFIT, and created Baymax.
  • But Not Too Foreign: Like Hiro, Tadashi is half Japanese, half white.
  • The Cameo: Tadashi has multiple ones through the series, mostly through photographs and video footage from Baymax's tests. Though he's not always in the center of the intrigue, it showcases that he's not forgotten and will always be part of Hiro's life.
  • Canon Foreigner: In the original Big Hero 6 comics, Hiro never had a sibling. Tadashi is, essentially, a stand-in for comic-book Hiro's father.
  • Catchphrase:
    • Says "unbelievable" whenever exasperated.
    • "Look for a new angle."
    • "I'm not giving up on you."
  • Chronic Hero Syndrome: He feels the need to help, even when there's nothing that can be done. This gets him killed, trying to save Professor Callaghan from a burning building despite his own lack of rescue experience or equipment.
  • Cool Big Bro: Tadashi is eternally supportive of Hiro, and encouraged him to do something great with his genius.
  • Dare to Be Badass: He encourages Hiro to use his smarts for something greater.
  • Dead Hat Shot: After being killed off-screen, there's a shot of Tadashi's cap while Hiro is heard screaming his brother's name in the background.
  • Deadpan Snarker: "Wow. Washed up at fourteen. So sad."
  • Death by Origin Story: Deconstructed. His death is what spurs Hiro to fight Yokai, but his grief from it is what drives him into Revenge Before Reason, nearly murdering Yokai when he finds out who he is.
  • Death Glare:
    • Tadashi gives a hilarious one to Hiro when they're both in jail; most specifically, as Hiro has his cell to himself due to being a minor and Tadashi is squished against the bars of the cell by the other botfighters.
    • A blink-and-you'll-miss-it, but he gives a brief one to Yama and his thugs while he rescues Hiro from them.
    • He gives another, more discrete one to Krei when he was gonna leave with Hiro's invention.
    • In the deleted A Minor Kidroduction prologue (starting at 0:32), a younger Tadashi gives a nasty one to bullies making fun of Hiro, which scares them enough to walk out the class with their heads low.
  • Decomposite Character: He has some traits that originally belonged to Hiro's older and more mature comic counterpart, such as being the one to build Baymax.
  • Determinator: Tadashi did eighty-four tests before Baymax finally worked. He also wasn't going to give up on Hiro constantly encouraging him to do something with his life.
    Tadashi: I'm not giving up on you...
  • Dies Differently in Adaptation: In the manga adaptation, Tadashi doesn't die in a fire, he gets sucked into a portal while trying to help Robert Callaghan bring Abigail back. Hiro believes that he could be alive in Another Dimension but Baymax confirmed that he wasn't in the Acid-Trip Dimension where they found Abigail.
  • Dub Name Change: In the Korean and Mandarin Chinese dub of the film, Tadashi is renamed "Teddy Armada".
  • The Dutiful Son: More like "The Dutiful Nephew", but Tadashi is the more responsible one than Hiro, and makes it clear that his brother has to make it up to their aunt for his illegal botfighting.
  • Establishing Character Moment: His first scene involves him saving Hiro from Yama and his goons, asking if he's alright before punching him for doing such a dangerous stunt, and also asking Hiro if he plans to use talents for something better.
  • Exhausted Eye Bags: Can be seen in one of video footages of him testing Baymax.
  • Famous Last Words: "Someone has to help!"
  • Fanboy: Hiro mentions that Tadashi was a big fan of Trevor Trengrove and got inspired by his theory to build Baymax. Turns out the theory was actually Wendy Wower's, which Trengrove stole from her, and he ends up idolizing her later on.
  • Fatal Flaw: His selflessness when he tries to save Callaghan from the fire. He doesn't consider that Hiro might try to follow him inside (which Hiro does) or the grief it would cause Hiro if he fails.
  • Foolish Sibling, Responsible Sibling: Tadashi is the Responsible to Hiro's Foolish. He regularly attends school (unlike Hiro, who spends most of his time bot-fighting since he graduated from high school early) and encourages Hiro to be more productive with his intelligence. In the beginning of the film, he's the one who bails Hiro out of trouble when Yama's goons are about to beat him up.
  • The Gadfly: Is not above playfully teasing his brother, as revealed in the scene where he tells him his fly was down for the whole time Hiro presented his project at the showcase... and it was correct.
  • The Glasses Gotta Go: A meta example. Early concept arts of Tadashi had him wearing glasses, but it was eventually dropped.
  • Handshake Substitute: He and Hiro would fist bump and then make explosion noises.
  • The Heart: Tadashi provides the optimistic drive to the motivations of his friends and his younger brother.
  • Hidden Depths: Despite being the Determinator and always encouraging Hiro to never give up, "Failure Mode" shows a complete different side of Tadashi: being frustrated after 57 missed attempts and considering giving up. Shows that even if he was optimistic and determinate, Tadashi was still human and had bad days where he considered giving up was an option, thinking spending so much time and energy on Baymax was pointless and would never work.
    Hiro: I never saw him like that...
  • Hollywood Nerd: He looks like a male model, or perhaps a Disney Prince, but he's skilled with building robots.
  • Honor Before Reason: He goes in to attempt to save Callaghan from a building completely engulfed in flames, with nothing but one eyewitness account that Callaghan was still in the building in the first place. While this is very noble, on the other side of the coin, he doesn't even remotely consider that his brother may go in after him, which Hiro does in fact attempt to do or the grief he will inflict upon Hiro if he fails in his rescue attempt (which he does).
  • Iconic Item: Is rarely seen without his San Fransokyo Ninjas baseball cap. It's one of the few things Hiro has left of him after his death.
  • It Runs in the Family: He scolds Hiro for bot fighting the exact same way Aunt Cass scolds him and Hiro after bailing them out of jail. Also the use of the word "knucklehead".
  • Killed Offscreen: Died in the Exposition Hall explosion trying to rescue Callaghan. The only thing the audience sees is the building exploding, and a shot of Tadashi's cap while Hiro screams his name in the background.
  • Living Emotional Crutch: To Hiro, Tadashi isn't just his big brother. He's also his best friend and the most important figure in his life. His death sent Hiro into depression.
  • Meaningful Name: A common meaning for Tadashi's name is "loyal" and his name sounds like the Japanese adjective tadashii (正しい) which means "fair," "proper," or "righteous." All of which matches his Nice Guy and All-Loving Hero personality.
  • Mixed Ancestry: He's half white and half Japanese.
  • Mr. Fanservice: Is definitely attractive, and his clothes have been shown emphasizing his muscles and broad shoulders. Even the series' exaggerated geometric style seem to show those well.
  • Nephewism: He and Hiro were raised by their Aunt Cass after their parents died.
  • Nerds Are Sexy: He's an attractive robotics major.
  • Nice Guy: His character description here indicates him to be one:
    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.
  • Nice Hat: Has shown to frequently wear a cap with the team logo of the San Fransokyo Ninjas on the front. The back of his cap (and a white T-shirt he frequently wears) has the Ninjas' team symbol.
  • Only Friend: To his younger brother, Hiro, before he introduces Hiro to the rest of the team.
  • Out-of-Character Alert: In "Obake Yashiki", "Tadashi" telling Hiro he doesn't need limits and that he shouldn't waste his time fixing Baymax confirms for Hiro that it's not really his brother.
  • The Paragon: Tadashi will always be there to save his brother, but at the same time wants to point Hiro in the right direction.
  • Parental Substitute: Tadashi acts not only as a Cool Big Bro to Hiro, but also acts as a father figure.
  • The Pollyanna: Despite losing his parents at a young age and taking a huge responsibility by being Hiro's father figure, Tadashi is an optimistic individual that doesn't see giving up as an option, and shares this point of view to his younger brother.
  • Posthumous Character: It was stated by the creators during their panel at the 2018 San Diego Comic Con that he would always have a presence in the show. Tadashi died in the movie but still appears in the series in video footages, pictures and such.
    • In "Obake Yashiki," Obake uses a ultra-realistic hologram of Tadashi to trick Hiro.
    • He has a big role in "The Present", which happens during the first Christmas Hiro and Aunt Cass has to spend without him. He appears in flashback and video footage respectively, and is mentioned by a lot of characters.
  • Pretty Boy: He's quite the handsome young man.
  • Puppy-Dog Eyes: This scene.
    Baymax: On a scale from one to ten, how would you rate your pain?
    Hiro: Physical? Or Emotional? (glares at Tadashi)
    (Cue puppy dog eyes and frown from Tadashi.)
  • Red Oni, Blue Oni: The mature, responsible Blue Oni to Hiro's brazen, impulsive Red Oni.
  • Small Role, Big Impact: He died after ten minutes of screentime, yet his death is what triggers the main story of the movie.
  • Smart People Build Robots: He created Baymax.
  • Something They Would Never Say: In "Obake Yashiki", Hiro starts to realize the Tadashi he's been talking to is a not really his brother when he tells him limits will slow him down and to not focus his energy on continuing his old work.
    Hiro: [backing away from the fake Tadashi] Tadashi would never say those things [...] You are not my brother!
  • So Proud of You: In his own way to Hiro after he got an acceptance letter to San Fransokyo Institute of Technology.
    Tadashi: [to Hiro] Welcome to nerd school, nerd.
  • Straight Man and Wise Guy: The Straight Man who goes to college and encourages his little brother to do the same, to Hiro's Wise Guy who spends his free time competing in illegal bot-fights.
  • Tall, Dark, and Handsome: Tadashi is quite tall, black-haired, and extremely good-looking.
  • Tall, Dark, and Snarky: He also has a sarcastic side.
  • Too Good for This Sinful Earth: First he loses his parents and he himself becomes the victim of his own helpful nature (and by some direction, murdered at the hands of the man he idolized). Ironically, San Fransokyo becomes even more sinful following the rise of the supervillains that Big Hero 6 has to face.
  • Vague Age: It doesn't help that the Japanese media calls him 21, while Hiro's San Fransokyo Files say he's 18. The general consensus is that he's somewhere between the two. Tadashi's voice actor Daniel Henney says he's either 19 or 20.

    Aunt Cass 

"For 10 years I have done the best I could to raise you. Have I been perfect? No! Do I know anything about children? No! Should I have picked up a book on parenting? Probably?! Where I was going with this? I had a point..."
Voiced by: Maya Rudolph
Appearances: Big Hero 6 | The Series

Hiro and Tadashi's aunt, who adopted them after their parents died.

  • The Ace: When it comes to cooking competitions, Cass is the unbeatable champion who wins all battles without struggle AND without cheating. She even defeats the supervillain and Evil Chef Momakase.
  • Action Mom: More like "Action Aunt". "Food Fight" shows that Aunt Cass is quite acrobatic. Oh, and she's not afraid to use knives to defend her nephew from harm.
  • Adorkable : She has an almost child-like glee whenever she gets excited. It's just so cute.
  • Adult Fear: Her sisternote  and brother-in-law die, leaving behind her young nephews who she raises as her own. Then her oldest nephew dies in a fire trying to save his teacher.
  • Amazingly Embarrassing Parents: Her shipper tendencies around Hiro and Megan embarrasses her nephew.
  • Anger Born of Worry:
    • In the movie, she's introduced being mad against her nephews after being arrested, and worrying about their well-being as well as how she's been raising them over the past 10 years.
    • In "The Bot-Fighter", after Hiro gets arrested, she has to bail him out yet again. She's understandably mad, and grounds Hiro. After Hiro notes he's never seen Aunt Cass that mad in a long time, Baymax notes it's out of concern for him.
  • Badass Driver: Aunt Cass drives away from the buddy guards like a pro.
  • Badasses Wear Bandanas: Wears a yellow bandana in the Food Fight cooking competitions. She quickly showcases to be a badass chef who contrary to her opponents, wins all the duels without cheating once.
  • Battle Trophy: As of "Food Fight", Aunt Cass collects all the knives of the chefs she defeated in the Food Fight competitions.
  • Canon Foreigner: She was made specifically for the film adaptation. Possibly as a stand-in for Hiro's mother, who is not dead in the comics.
  • Cheaters Never Prosper: She teaches this to those who try to cheat to win against her in "Food Fight." She ends up taking their knives as a Battle Trophy.
  • Chef of Iron: Becomes a food-fighter in "Food Fight".
  • Collector of the Strange: Has an entire room full of knives that she gained from the chefs she defeated in "Food Fight".
  • Comfort Food: After bailing Hiro and Tadashi out of jail, she starts eating a doughnut, while lampshading it. She also encourages it in Hiro, trying to comfort or reward him with his favorite foods, like hot wings.
  • Cool Aunt: Took in her nephews when they were orphaned and is an eternally loving, supporting figure for both.
  • Cuddle Bug: Is always prone to hugging her nephews. After Tadashi's death, she has a "last hug" tendency, which is giving a second last hug to Hiro before he goes somewhere.
  • Damsel out of Distress: Though the anti-gravity device helped, Cass escaped the net Momakase trapped her in and is the one who neutralized Momakase with the same net by herself.
  • A Day in the Limelight: "Food Fight" turns around Aunt Cass participating in the underground cooking competitions, which are also attented by the villain Momakase.
  • Deadpan Snarker: Has her moments, the peak of which is in "Aunt Cass Goes Out".
  • Dub Name Change: In the two french versions, Aunt Cass' name is changed to "Tante Cassie" (Aunt Cassie) since "Cass" sounds too anglophone.
  • Dude Magnet: Over the course of the series, she catches the eye of Krei, Mel and Chief Cruz.
  • Establishing Character Moment: Cass' first scene has her hugging her nephews in relief after posting their bail and then angrily pulls their ears for scaring her.
  • Fangirl: Fangirls hard when renowned chef Bolton Gramercy is in her café. Turns out to be a light case of Broken Pedestal when she realizes how big of a Jerkass he is.
  • Genki Girl: A rare adult type, but she is always excited and happy.
  • Good Parents: She's an adoptive parent who's always doing her best to raise Hiro and Tadashi.
  • Hartman Hips: Let's just say that if she were to decide to have children of her own, she would be well equipped for it. Seriously, though, her hips are wider than her shoulders.
  • Kindhearted Cat Lover: Owns a cat named Mochi and her coffee shop is named the "Lucky Cat Café."
  • Living Emotional Crutch: Now that Tadashi passed away, Aunt Cass is the only family Hiro has left.
  • Mama Bear:
    • In the movie, she goes to the police station to bail out Hiro and Tadashi after they get into an illegal bot fight and lectures them for getting themselves in trouble afterwards, being genuinely concerned for their safety, and doing whatever she can to be the best possible motherly figure.
    • In "Food Fight", when Aunt Cass was gonna get Hiro whom she thought was out botfighting, she was ready to use knives in order to protect him and herself from harm. Do not mess with Hiro...
  • Nervous Wreck: Loses all control when worried about her nephews, and she copes with it with food.
  • Nice Girl: Nurturing, loving, caring, amiable, devoted, supportive, and motherly.
  • Oblivious to Love: She doesn't seem to be aware Chief Cruz has a thing for her.
  • Only Known by Their Nickname: Everyone calls her "Cass", which is a nickname derived from "Cassandra" or "Cassidy".
  • Only One Name: Only known as "Aunt Cass", and no clue of her last name.
  • Outliving One's Offspring: Her eldest adoptive son/nephew, Tadashi, dies in a fire at only 18 or 21.
  • Parental Obliviousness: Aunt Cass has no idea of her nephew's superhero whereabouts and she buys most of Hiro's lies, despite the fact he's a terrible liar.
  • Parental Substitute: Becomes one to Hiro and Tadashi after their parents died, then even more so to Hiro after Tadashi dies.
  • Parents as People: Lampshaded. Cass never expected to be a parent, nor did she know anything about being a parent. But she loves both her nephews, and they clearly love her back.
  • The Pollyanna: After Tadashi's death, she maintains her cheerful and optimistic personality for Hiro's sake, even if it's clearly a façade and she obviously misses her nephew.
  • Promotion to Parent: She mentions that she never expected to be a parent, but she has raised Tadashi and Hiro for ten years and always refers to them as her "boys."
  • Shipper on Deck: Introduces Hiro to Megan, the daughter of an old friend of hers, and is trying really hard to make them an item.
  • Single Tear: Sheds one when she comforts Hiro over spending their first Christmas without Tadashi.
  • So Proud of You: Cass always tells Tadashi and Hiro how proud she is of their accomplishments.
  • Stepford Smiler: In the movie, she forces herself to smile in Hiro's presence in order to cheer him up after Tadashi's death, even if it's quite obvious she's suffering herself. It's shown in "The Present" where she cheers up a saddened Hiro over Tadashi's death, and only cries when he isn't looking.
  • Supreme Chef:
    • "Fred's Bro-tillion" had Cass cater for Fred and his family (as Hiro recommended her for the gig); she later gets a stack of orders to cater OTHER events as well.
    • Demonstrated in "Food Fight," where in underground cooking duels she wins strings of matches after defeating her mentor. Given "cheating is encouraged" in said duels her ability to show Cheaters Never Prosper makes her a Chef of Iron. In the duels she wins the knife set of her opponent as a Battle Trophy, and when her mentor asks for his "Nana's knives" back, she showed him her Trophy Room before asking which knives "were his Nana's."
    • Subverted in "Lie Detector", though it's Played for Laughs. Even if Cass is an excellent chef, she improvises a recipe of " acai-salami bowl". It's as disgusting as you might imagine, and Hiro lies about it being good not to hurt Aunt Cass' feelings.
    Aunt Cass: [grimaces after tasting her acai-salami bowl] Ugh! Can't believe Hiro likes this!
  • Sweet Tooth: For pastries, as she has her own café.
  • Trophy Room: In "Food Fight", Cass beat so many chefs in the underground cooking competitions that she has a room dedicated to the knives she gained from them. Bolton, who asked for his Nana's knives back, is shocked, not to say the least.
    Aunt Cass: Which one are your Nana's?
  • Worthy Opponent: To Momakase. Though it's inverted as Momakase is determinate to annihilate Cass since she thinks she's better than her.


Appearances: Big Hero 6 | The Series

The Hamada family's pet calico cat.

  • Action Pet: Mochi looks like your average, sweet, fat cat. But mess with his owner Hiro or Baymax, and you'll regret it. See for yourself as he fights Hibagon Ned and wins!
  • Artistic License – Biology: Mochi has a rather long tail for a Japanese bobtail, who usually have short tails resembling those of rabbits.
  • Animal Gender-Bender: He's a male calico cat.note 
  • Badass Adorable: Took on Hibagon Ned by himself in "Muira-Horror!" to save Hiro, GoGo, Krei, and Baymax.
  • Beware the Nice Ones: Mochi is the sweetest cat... until you try to attack Hiro and Baymax.
  • Big Fun: He's a fat cat, and a source of funny and heartwarming moments.
  • Bitch in Sheep's Clothing: Averted in the franchise itself, but Played for Laughs in the chibi short "Mochi No!" where he's cute and sweet one second before viciously pulling out his claws with a devious grin the next one.
  • Brick Joke: Mochi and rocket boots. In the first drafts of the movie, Mochi was supposed to be the Team Pet and have rocket boots as he accompanied Big Hero 6 on missions, before it was eventually dropped from the final project. But many BH6 medias include nods to Mochi with rocket boots:
    • In the final version of the movie, a black cat that resembles Mochi is seen wearing rocket boots the first time Hiro visits the nerd labk, as a nod to the early movie draft.
    • In the deleted prologue of Hiro and Tadashi's childhood, they put rocket boots on Mochi who finds himself flying accross the café. Many other printed media confirm this as canon as Hiro state they did it as kids or Hiro and Tadashi do it again to Mochi in the present.
    • The rocket boots come back in the "Mochi No!" short as Mochi uses it to escape Wasabi and Fred.
  • Butt-Monkey: This poor cat always finds himself in the craziest situations.
  • Cats Are Mean: Averted. He's a chubby Japanese bobtail cat that likes to snuggle, and is one of the nicest Disney cats to date.
  • Cats Are Snarkers: Look at Silent Snarker below.
  • Cats Hate Water: In his short with Baymax, Mochi yowls and flails whenever the robot tries to clean him in the sink.
  • Cat Up a Tree: The premise of the "Save Mochi" Big Chibi 6 short.
  • Cool Cat: Already a nice, cuddly cat, he becomes even cooler after becoming "Slow Clap Cat". And then he beats up Hibagon Ned by himself in "Muira-Horror!".
  • Cuddle Bug: He likes attention and being scooped in and petted, most of the time by Baymax.
  • Curious as a Monkey: Mochi is a curious cat, and his instinct to explore often puts him in trouble.
  • Cute Kitten: He may not be a kitten, but no one can resist Mochi's cuteness.
  • Distressed Dude: Gets kidnapped by Mr. Sparkles and threatened to be blasted to space after his "Slow Clap Cat" video got more popular than his show.
  • Death Glare: Gives one to Hiro after he threw him up the stairs.
  • Evil-Detecting Cat: More of a "Jerkass-Detecting Cat"; when Krei goes to take Aunt Cass out on a date, he hisses at him.
  • Fluffy Dry Cat: In "Food Fight", Baymax pets Mochi at one point and the static causes his hair to brissle.
  • Freeze-Frame Bonus: Mochi can briefly be seeing playing with a laser-pointer during Hiro's Hard-Work Montage.
  • Green-Eyed Monster: Played for Laughs when Cass adopts a Mayoi and gives it more attention than to Mochi. Bonus points for actually having green eyes.
  • The Internet Is for Cats: Becomes a meme after Honey Lemon's video of him "slow clapping" becomes viral.
  • Mascot: He is the eponymous Lucky Cat of Aunt Cass' café.
  • Meaningful Name: He is named after a Japanese rice cake, kinda fitting as he looks like he's had too much cake.
  • Me's a Crowd: In the chibi short "Mochi No!", Mochi manages to walk into some sort of cloning device offscreen which clones tons of Mochis (who goes out in smoke when touched) and now Wasabi and Fred must try to catch the real one.
  • Nice Guy: A sweet, docile and affectionate cat that loves being anywhere he can get attention.
  • Papa Wolf: Protects both his owner Hiro and Baymax from Ned Ludd in Hibagon form by jumping on his face and clawing him.
  • Rocket Boots: Often associated with Mochi. See Brick Joke above.
  • Silent Snarker: Just look at his face as he watches Hiro and Aunt Cass switching roles after Aunt Cass sneaks out in "Food Fight".
  • Team Pet: The series seems to be treating him as this to the heroes, seeing as he got a short all to himself. And then there's him beating Hibagon Ned by himself.
  • That Poor Cat: He gets tossed up the stairs by Hiro when he's trying to hide Baymax from Aunt Cass. He turns out to be okay but is not happy with Hiro and runs away howling when he approaches.
  • Tropey, Come Home: Mochi has the tendency to wander off from home more than once in the series and it's up to the team to bring him back before Aunt Cass realizes.

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