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. He showed to be extremely arrogant and condescending to those around him. Todorokis childhood caused him to not interact with most of the characters for a part of the series. His face is usually unreadable; his voice is also relatively monotone.