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. His eyes are sharp and bright red in color. Katsuki is a crude, arrogant, short-tempered, and aggressive person. Katsuki tends to come off as unheroic; this problematic behavior going all the way back to his early childhood days. He showed to be extremely arrogant and condescending to those around him.