Katsuki is a young man of average height, with a rather narrow but muscular body and lightly tanned skin. He has short ash blonde hair that points upwards at all angles of his head, but sits low on his forehead, reaching down to his eyebrows, and his eyes are pointed and thin, bright red in color. He is a rude, arrogant, angry and aggressive person, but he is also kind-hearted (even if he doesn't show it). His quirk : explosions.