Rei is a young woman human who has pale skin, long light blue hair with a small pigtail on the left side of her hair. Her hair is parted on the right side, so it covers her right eye. She has bright orange eyes. She wears a school uniform with black long stockings. For shoes she either wears white-pink sneakers (if outside), red-white uwabaki (at school), or yellow slippers (when inside at places that aren't school). She has a dark purple aura emanating from her, signifying her bad luck.