Mari Akamine serves as a maid, embodying a stoic demeanor. She stands 175cm tall with a slim, young-adult physique and pale skin, her measurements being 92-58-87cm. Her appearance includes waist-length or longer blond hair, parted centrally and styled with ringlet curls. Her violet eyes are noted as "hosome". She consistently wears a maid's dress, apron, headdress, gloves, garter belt stockings, and a string ribbon tie.