Naomi is a high school-age girl with hip-length black hair that is styled in a side-swept hime cut and dark grey eyes. She also has a beauty mark underneath her left eye. In general, her appearance does not resemble her brother, given her charismatic allure compared to Tanizaki's timid disposition. She wears a standard seifuku that consists of a white long-sleeved blouse attached with a red sailor-style collar and a black pleated skirt that comes above her knees. She also dons black socks.