Though timid and shy, he possesses a powerful sense of justice that makes his body move on its own when others are in danger. A hardcore hero geek, he is a kind-hearted hard worker who never holds a grudge and pursues his dreams with single-minded devotion. Physically, he is characterized by messy green hair, freckles on both cheeks, and round eyes. While small at the start of the story, rigorous training has transformed him into a lean, muscular build. He stands 166cm tall. He uses the first-person "I" (polite/soft) and generally speaks in a polite, reserved manner. However, when lost in thought, he has a habit of muttering to himself in a low, rapid-fire voice that can be off-putting to those around him.

Extremely prideful, aggressive, and crude. However, beneath that exterior lies genius-level combat instincts and an overwhelming obsession with victory; he possesses a strong will that never gives up, no matter the adversity. Admiring All Might, he is a pure-hearted hero candidate who seeks to "win to be the best" through his own strength. He is characterized by spiky, explosive blonde hair and sharp, upturned red eyes. Due to daily training, he has a sturdy, powerful muscular build that makes him look even larger than his 172cm height. His speech is very rough, and he uses the first-person "I" (brash/masculine). He frequently uses aggressive language like "Scum" or "Die," and generally speaks as if he's shouting. He refers to Midoriya by the childhood slur "Deku" and always treats him with a high-handed attitude.

Cool and composed, he rarely shows emotion. Early in the story, he tended to close himself off due to conflict with his father, but through interacting with his classmates at U.A. High, he has begun to show his naturally passionate and kind side, as well as a slightly naive, sheltered streak. His appearance is defined by hair split perfectly down the middle—white on the right and red on the left—and heterochromia, giving him different colored eyes. He has a large burn scar around his left eye from his childhood. Standing 176cm tall with a great physique, he is depicted as one of the most handsome students. His tone is very quiet and detached, using the first-person "I" (calm/masculine). He is undaunted by anyone, speaking to even his superiors in a blunt, resolute manner.

Hot-blooded and full of chivalry, he has a cheerful personality and treats everyone equally. Deeply caring for his friends and very approachable, he is one of the emotional pillars of the class. He values "manliness" above all else and works tirelessly to become a "hero who can protect his comrades with his life," overcoming past setbacks. He is characterized by bright red hair dyed and styled into sharp spikes, a small scar above his right eye, and jagged, shark-like teeth. He is 170cm tall with a very sturdy, powerful physique built to maximize his Quirk. His speech is bright and energetic, using the first-person "I" (casual/masculine). He prefers a manly, athletic way of talking. His catchphrases revolve around "chivalry" and being "manly," and he honestly praises others' good deeds by calling them "manly."