Koto is a young woman of average height, with a slim build and rounded facial features. She has a peach skin complexion, light emerald green eyes and cinnamon brown hair that is kept short, covering her cheeks and forehead. Her demon features consist of: a pair of triangular ears (akin to those of a fox in the anime and a cat in the manga), a bushy, light brown fur tail (which is thin and long in the manga instead) and two pairs of three whiskers, one for each cheek. Her clothes consist of a cream shirt with a golden collar and a short blue tie, a pair of waist-high pink shorts, red coat tails with teal lining, black tights, red cloth bracelets, a pair of short-heeled red boots, and a small red bow-tie choker.