Shota Aizawa, also known by his hero name Eraser Head, is the chronically exhausted homeroom teacher of Class 1-A at U.A. High School.He is defined by his cold logic, strict standards, and a habit of taking naps in a bright yellow sleeping bag during class. Despite his harsh, detached demeanor and frequent threats to expel students, he is fiercely protective of his class and acts as a dedicated mentor who will risk his life to keep them safe.Core AbilitiesErasure Quirk: He can nullify anyone's superpower just by looking at them. The effect ends when he blinks, which causes him severe dry eye.Capturing Weapon: Because his power is purely defensive, he uses a specialized cloth scarf made of steel wire and carbon nanofibers to bind and capture enemies in close combat.

Izuku Midoriya, widely known by his hero name Deku, is the main protagonist of My Hero Academia and a student in Aizawa's Class 1-A.Born "Quirkless" in a world where almost everyone has superpowers, Deku spent his childhood being bullied—especially by his childhood friend, Katsuki Bakugo. Despite this, his innate, self-sacrificing heroism catches the attention of the world's number one hero, All Might, who chooses Deku to inherit his legendary, transferable Quirk: One For All.Core Profile & EvolutionPersonality: Deku is exceptionally polite, analytical, and deeply empathetic. He is a massive "hero nerd," constantly scribbling detailed strategies and power breakdowns of other heroes in his notebooks.The Power (One For All): This Quirk stockpiles immense physical strength, speed, and agility. Initially, Deku's body is too weak to handle it, causing him to break his own bones every time he punches or kicks. Over time, he develops Full Cowling to distribute the power evenly throughout his body and shifts to a kick-based fighting style called Shoot Style to protect his heavily damaged arms.Hidden Sub-Quirks: As the story progresses, Deku unlocks the unique Quirks of One For All's previous users, giving him a versatile toolkit including Blackwhip (energy tendrils), Float (levitation), and Danger Sense (precognition).Relationship with Aizawa: Early on, Aizawa is incredibly hard on Deku, even threatening to expel him on day one because Deku's tendency to destroy his own body makes him a liability. However, as Deku learns to control his power, Aizawa becomes one of his most trusted mentors and protectors.

Katsuki Bakugo, known by his childhood nickname Kacchan and later his hero name Great Explosion Murder God Dynamight, is Deku's fiercely aggressive rival and a fellow student in Class 1-A.He is defined by his intense pride, explosive temper, and unmatched battle instinct. While he starts the series as an arrogant bully who looks down on Deku for being Quirkless, his time at U.A. High School forces massive character growth, transforming him into a true hero who learns to fight not just to win, but to protect others.Core Character ProfileThe Quirk (Explosion): His sweat contains a nitroglycerin-like substance that he can detonate at will from the palms of his hands. He can unleash massive blast waves, use the explosions to propel himself through the air at high speeds, and create blinding flashbangs.Hero Costume: His signature outfit features massive Grenade Gauntlets on his forearms. These gauntlets store his nitroglycerin sweat, allowing him to fire devastating, long-range blasts without putting physical strain on his arms.Relationship with Deku: Bakugo spent years bullying Deku, largely out of an insecure fear of Deku's unbreakable spirit. When Deku suddenly gets a powerful Quirk, Bakugo feels betrayed and threatened. However, after a brutal midnight rematch, they form a fierce but mutual respect, eventually becoming the ultimate "win to save, save to win" duo.Relationship with Aizawa: Like Deku, Bakugo is initially seen by Aizawa as a handful due to his violent temper. However, Aizawa recognizes Bakugo's sharp intellect and pure desire for victory, famously defending him to the media by stating that Bakugo's aggression is simply his drive to be the number one hero.

Core ProfileThe Quirk (Zero Gravity): By touching an object or person with the pads on her fingertips, she can nullify the effects of gravity on them, making them float. She cancels the effect by touching her fingertips together and saying "Release." If she floats things that are too heavy, or if she makes herself float for too long, she gets severe motion sickness and vomits (often hilariously depicted as floating sparkles).Motivation: Unlike many of her classmates who want fame, Ochaco initially wants to become a hero to earn money so her parents can live an easy life. Her family runs a struggling construction business, and she realizes her gravity powers could drastically lower their labor costs.Relationship with Deku: She is the very first person to befriend Deku at U.A. High School.