If you have spent any time watching My Hero Academia, you have probably noticed a large, round hero who eats constantly and somehow still manages to be one of the toughest fighters in the series. That hero is Fat Gum, and there is a lot more to him than his size and his appetite.
This guide breaks down everything worth knowing about Fat Gum, from his real identity and his Quirk to his personality, his role as a mentor, and why fans have grown so attached to him over the years. Whether you just started the series or you are trying to understand his powers in more detail, this article covers it all in one place.
Who Is Fat Gum
Fat Gum is a professional hero in the world of My Hero Academia, the popular anime and manga series created by Kohei Horikoshi. He is best known for his round body, his massive appetite, and a Quirk that lets him absorb impact damage using his own body fat.
At first glance, he might come across as comic relief. He eats constantly, he jokes around, and his design is intentionally exaggerated. But once you see him in action, it becomes clear that Fat Gum is one of the more strategic and physically dependable heroes in the story. He knows how to read a fight, and he rarely panics even when things get dangerous.
Fans searching for fat gum are usually trying to understand who he is, what his powers do, and how he fits into the larger My Hero Academia universe. This article answers all three.
Fat Gum’s Real Name and Hero Ranking
Fat Gum’s real name is Taishiro Toyomitsu. Like most heroes in the series, he operates under a hero name that reflects his abilities and public persona, while his birth name is mostly used by close friends, colleagues, and in official records.
He is officially known as the BMI Hero, a nickname that plays on his body type and his Quirk, which is directly tied to body fat. At various points in the story, he holds different rankings among Japan’s professional heroes, including a notable stretch as the No. 58 Pro Hero. His ranking shifts as the story progresses, which is common for heroes in this universe since rankings are tied to public approval, resolved cases, and overall performance.
Despite not always sitting at the very top of the rankings, Taishiro is respected among his peers for his combat experience and his close working relationship with the police force, something not every hero has.
What Is Fat Gum’s Quirk
Fat Gum’s Quirk is called Fat Absorption. This ability allows him to make objects, attacks, and impact stick to his body and sink into his fat, essentially cushioning blows that would seriously injure a normal person.
Here is the part that makes his Quirk genuinely clever rather than just a defensive gimmick. The kinetic energy from every hit he absorbs does not just disappear. It gets stored inside his body. When the moment calls for it, Fat Gum can convert that stored energy into a burst of offensive strength, essentially turning every punch thrown at him into fuel for his own counterattack.
There is a tradeoff, though, and it is an important one. Converting his fat into muscle and power comes at the cost of his defense. The more energy he releases, the thinner and more vulnerable he becomes, since the fat that once protected him from damage is being burned away to fuel his strength.
This creates a natural risk and reward system in every fight he is part of. He can absorb an incredible amount of punishment, but if he uses too much of that stored energy at once, he temporarily loses the very durability that made him such a reliable tank in the first place.
Why This Quirk Works So Well in Battle
Fat Absorption is particularly useful against enemies who rely on brute strength or repeated physical strikes. The harder an opponent hits him, the more potential energy Fat Gum has to work with later. Villains who try to overwhelm him with sheer power often end up giving him exactly what he needs to turn the fight around.
It also makes him valuable as a frontline defender. Because he can take hits that would be devastating to lighter or faster heroes, he often positions himself to protect teammates during dangerous encounters.
Fat Form vs Skinny Form Explained
One of the most talked about aspects of Fat Gum is the transformation fans call his skinny form. Under his large, rounded appearance is a surprisingly muscular and athletic body.
When Fat Gum burns through his stored fat to unleash powerful attacks, his entire physique changes. The soft, padded look disappears, replaced by a lean, toned build. His proportions shift to something closer to a traditional action hero, and his speed and striking power noticeably increase.
This transformation is not permanent. Once the burst of energy is used, his body naturally returns to its normal fat form over time, especially as he eats more food to rebuild his reserves. This explains why he is almost always hungry. His body is constantly working to restore the fat that fuels his Quirk.
For readers who enjoy power scaling discussions, this mechanic is worth paying attention to. Fat Gum essentially operates on a resource system, similar to stamina or energy meters in other stories. Managing that resource wisely is often the difference between winning and losing a fight.
Fat Gum’s Personality
Fat Gum is warm, easygoing, and genuinely likable. He treats civilians kindly, jokes around with his colleagues, and rarely takes himself too seriously outside of combat situations.
That said, his laid back attitude disappears the moment lives are on the line. When a fight turns serious, Fat Gum becomes focused, determined, and noticeably more intense. He has little patience for drawn out confrontations when people are in danger, and he pushes himself hard to end fights quickly and protect the people around him.
His time working closely with the police force has also given him a strong understanding of the criminal underworld. This experience makes him more perceptive than his casual demeanor might suggest, and it allows him to make smart tactical decisions during high pressure situations.
Fat Gum’s Role as a Mentor
Fat Gum plays an important role as a mentor to several younger heroes in training, and this is one of the more meaningful parts of his character arc.
He takes on interns including Tamaki Amajiki, known as Suneater, and later Eijiro Kirishima, known as Red Riot. Through these relationships, viewers get to see a softer, more encouraging side of him. He recognizes talent quickly and is not shy about praising his students, even when they doubt themselves.
Tamaki, in particular, struggles with confidence, and Fat Gum’s supportive but honest approach helps push him toward becoming a stronger hero. This mentorship dynamic adds emotional depth to Fat Gum’s character and shows that his value goes beyond his physical abilities in battle.
Fat Gum’s Costume and Appearance
Fat Gum’s costume has evolved slightly over the course of the series, but the core design remains recognizable. His hero suit typically includes fitted pants, a zippered hood, and bold lettering across his chest displaying his initials.
The color scheme and small design details have changed at different points in the story, reflecting both the passage of time and shifts in his role as a hero. Even with these updates, his overall silhouette stays consistent, which helps him remain instantly identifiable to both civilians in the story and fans watching at home.
His large, rounded shape is often compared to a stacking doll, and this comparison has become something of an affectionate joke within the fan community.
Notable Battles and Moments
Fat Gum has been part of several standout moments throughout the series, but one of the most memorable involves his fight alongside Eijiro Kirishima against two members of the Eight Bullets during the Shie Hassaikai arc.
During this battle, Fat Gum takes repeated, punishing hits while protecting his intern. Rather than folding under the pressure, he uses the damage to his advantage, gradually building up enough stored energy for a decisive final strike. This fight is often cited by fans as one of the clearest examples of his Quirk being used strategically rather than just as a defensive tool.
Beyond combat, Fat Gum also plays a role during larger conflicts in the story, including moments where he takes on leadership responsibilities and helps coordinate other heroes. These moments highlight that his value extends beyond individual fights and into the bigger picture of hero teamwork.
Fat Gum’s Popularity Among Fans
Fat Gum has built a loyal following within the My Hero Academia community. Part of his appeal comes from his design, which manages to be both humorous and genuinely likable without feeling like a throwaway joke character.
He has ranked in the series’ official popularity polls on multiple occasions, and merchandise featuring his character, including collectible figures, continues to be popular among collectors. His transformation between fat form and skinny form also makes him a frequent topic of fan art and discussion, since the visual contrast is dramatic and instantly recognizable.
Many fans also appreciate that his character is not defined purely by comic relief. His mentorship of Tamaki and Eijiro, combined with his reliable performance in combat, has helped him stand out as a well rounded and respected member of the cast.
Conclusion
Fat Gum is proof that a character built around a simple, almost silly concept can still become genuinely compelling. His Quirk, Fat Absorption, gives him a smart risk and reward mechanic that rewards patience and punishes recklessness, both for him and for his opponents.
Beyond the powers, his personality, his mentorship of younger heroes, and his willingness to take hits for the people he cares about have made him one of the more grounded and human characters in a series full of larger than life abilities.
If you are just discovering Fat Gum, keep an eye on his fights for the moments where he shifts from his fat form to his leaner, more powerful state. Those transitions say a lot about who he is as both a fighter and a person.
Frequently Asked Questions
What is Fat Gum’s real name?
Fat Gum’s real name is Taishiro Toyomitsu. Fat Gum is his professional hero name.
What is Fat Gum’s Quirk called?
His Quirk is called Fat Absorption. It allows him to absorb impact and store the energy in his body fat, which he can later release as offensive power.
Why does Fat Gum become skinny sometimes?
When he converts his stored fat into energy for powerful attacks, his body temporarily becomes leaner and more muscular. This is often referred to by fans as his skinny form.
Who does Fat Gum train as interns?
Fat Gum mentors Tamaki Amajiki, also known as Suneater, and later Eijiro Kirishima, also known as Red Riot.
Is Fat Gum a strong hero?
Yes. While his fighting style depends on managing his Quirk carefully, Fat Gum is considered one of the more durable and strategically skilled heroes in the series, especially in prolonged battles.
