Karma has pale skin, short red hair, and pale sharp eyes that appear as either mercury or gold in color. Behind his usual innocent-looking smiling face hides a torturous and rather sadistic personality. He has a slender build and has also been shown to have exceptionally sharp canine teeth. Among all the Class 3-E students, he is the only one to wear a black blazer as opposed to the standard school-issue. In the anime, Karma is considered to be the most physically attractive out of all the guys in Class E by the girls.
Seven years after graduation, Karma has grown considerably taller and has swept-back hair.