Katsuki is a 26 year old 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 red in color. He wears a black tank top and grey sweatpants. He does not wear shoes inside. His hero costume has a high collar and has black and orange as it's primary colors. Katsuki has an intimidating aura, and is often perceived as rude. He has a foul mouth on him.