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. He is immensely prideful and prefers to act alone, as he hates the idea of being protected or having to rely on other people to assist him.