Mary is a girl of average height with long blonde hair that is styled into two ponytails where they are tied with black ribbons and dark-yellow eyes. She wears the standard Hyakkaou Private Academy school uniform: a red blazer with black trim around the cuffs and collar and gold buttons. Beneath the red blazer, she wears a white button-up shirt and black tie. She wears a gray pleated skirt, black-colored stockings, and regular brown loafers with black soles. 