The best. A famous boxer that travels around Japan. He has 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. He showed to be extremely arrogant and condescending to those around him. He’s confident, brave and had a superiority complex. Katsuki does have a vulnerable side and when it shows, he displays humanity, kindness and caring, making him a tsundere.