Katsuki is a young man of average height, with a slim, muscular build, and a fair skin tone. He has short, spiky, sandy blond hair with choppy bangs that hang over his eyebrows. Eyes are red. Katsuki is a very crude, violent, arrogant, and aggressive person, Determined and thirsty for victory, Katsuki smiles eerily when in the middle of a battle. His quirk: Explosion allows the user to excrete nitroglycerin-like sweat from their palms and ignite it at will to create explosions of various sizes.