Katsuki Bakugo

Katsuki has proven to be one of the strongest students in Class 1-A, both in his physical and theoretical abilities. Many professional heroes have remarked on his immense skill, including Shota Aizawa, All Might, and even the Number 3 Hero, Best Jeanist. The League of Villains has also recognized his strength and sent men to capture him in a futile attempt to recruit him.

Enhanced Strength: Katsuki possesses superior physical strength compared to the rest of his classmates, having practiced for years. He has fought on par with Izuku when using his Quirk, and has also been able to pressure and subdue Shoto Todoroki during their battle at the festival.

Quirk: Explosion: Katsuki's Quirk allows him to secrete nitroglycerin through the sweat of his hands and detonate it at will to create explosions. The more Bakugo sweats, the stronger his explosions become. As Best Jeanist noted, Katsuki has a strong understanding of his Quirk's applications. He usually uses small, powerful explosions from his hands not only to blow up his opponents but also to propel himself and move through the air, among other non-combat uses. He can maintain the sequence of his explosions long enough to destroy a giant ice wall created by Shoto.
The explosions are powerful enough to send opponents flying with little time to react. He can use them quickly enough to evade incoming attacks, even in mid-air. Katsuki suffers some impact from his explosions due to their magnitude, but the overall effect is minimal given his physical conditioning. He is able to trigger constant explosions around himself without feeling any negative repercussions, even after many powerful blasts. However, excessive use can result in Bakugo injuring himself.

Katsuki is a young man of above-average height, with a lean, muscular build and fair skin. He has short, spiky, ash-blond hair with choppy bangs that hang over his eyebrows. His eyes are sharp and a bright scarlet.

His hero costume consists of a tight, black, muscle-hugging T-shirt with an orange "X" in the center, forming a V-neck. There are two dots along the left side of his collar, indicating the support company that designed his costume. His costume also features a metal collar with rectangular ends, each with three holes. His sleeves extend from inside his large, grenade-shaped gauntlets to his biceps. His belt, which also carries grenades, holds up his baggy pants with knee pads, beneath which he wears knee-high black combat boots with orange soles and eyelets. His mask is jagged and black, and as it wraps around his eyes, a large, orange-rimmed flare protrudes from each side.

His winter hero costume consists of a large jacket with a high collar, instead of the usual sleeveless shirt, although it has the same orange "X" design, so he can still sweat a sufficient amount; that's how his Quirk works.

In the time skip, Katsuki has a scar on the right side of his face, just below his eye on his cheek. He also has other marks on his shoulder and chest from his fights against Tomura.

Katsuki presented himself as a very impulsive, aggressive, and arrogant person, as seen in the way he treated Izuku, whom he constantly violated physically and psychologically, even inciting him to attempt to take his own life, showing his thuggish attitude.

He has a superiority complex, always wanting to be the best at everything and trying to prove it at all costs; however, even with these traits, he knows how to admit when he has been defeated, as demonstrated during the Trial Battle, when at the entrance of the academy, Izuku tried to explain to him that his Quirk One For All came from another person, and Katsuki interpreted that he was mocking him, so he tried to shut him up by saying that he simply beat him.

Although he's not the most charismatic hero, as the story progresses his behavior slowly begins to mature, becoming less rude and arrogant. As the year goes on, he starts to trust and cooperate with his classmates, whom he previously rejected because he wanted to do everything on his own, neither helping nor expecting help. That egotism cost him several mistakes in class that led to defeat or came very close to it, were it not for his reluctant cooperation with his classmates.

As the story has progressed, Katsuki's personality has gradually changed. Initially, he was very arrogant and intolerant, but little by little, he has softened his attitude to the point of implicitly showing concern for others, as demonstrated in the provisional hero license exam when he reduced his explosions to avoid harming Denki and Eijiro, or when he waited for Eijiro to return from the battle against the Eight Precepts of Death. He has also shown empathy, as seen in Shoto's case when he secretly listened to his past.