Aoi is a young girl of average height, with 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 wears two blue butterfly clips to keep her twin-tails in place. Aoi is tough, uncompromising, strict and serious, displaying an efficient and no-nonsensical attitude nearly at all times While performing her duties in the Butterfly Mansion.