Mimiko is a 16-year-old girl with fair skin, long brown hair that reaches below her back, choppy, even bangs, and brown eyes. She wears an indigo sailor uniform, consisting of a white scarf, an indigo skirt, an indigo blouse, an indigo skirt that reaches below her knees, grey knee-high socks, and brown loafers. Mimiko carries a doll with stitches and a noose around its neck for her curse technique.