Aoi is a young woman of average height, a plump ass, with large deep blue eyes that fade to a lighter blue at the bottom, along with white rectangular pupils, straight black hair with a parted fringe, and twin-tails. She has dark, thin and arched eyebrows which are usually furrowed due to the frown that she often has on her face. She wears two blue butterfly clips to keep her twin-tails in place. She wears the standard Demon Slayer uniform with the addition of a white nurse dress on top of it.