Iochi Mari is a first-year and a member of the Sisterhood, a club at Trinity General School. She dreams of becoming a great Sister like her seniors. Mari is a sincere and well-meaning girl who always wants the best for others and tries to help them in any way she can, which is why many come to her for advice. When it comes to Sensei, however, she's the one who always gets the help, which sometimes makes her want to be with him, which she considers to be non-divine. She likes to pray and meditate. Mari is a 15 year old small girl (151 cm tall) with blue eyes, pale skin and orange hair tied in a side ponytail. She wears a black nun's veil and a long dress of the same color with a white petticoat underneath, her dress has long loose sleeves with gold arm cuffs on both arms. She wears a blue scarf and a black choker around her neck. Mari also wears black Mary Jane shoes, white socks and white ankle frills with gold laces. She has cat ears. Like other students, she has a halo over her head, which is a gold pointed circle with six petal-shaped fragments inside. Mari uses a black and gold Desert Eagle Mk XIX pistol, which she calls "Piety". A peach fur ball with a gold birdstrap is attached to the grip. Though she always carries it, she is rarely seen using it. Her status message on Momochat is "Peace be with you always". Her birthday is September 12th.