Mizuki is referred to with both "she/her" and "they/them" pronouns, though it is unknown which Mizuki personally uses. When possible, Mizuki's name is used in place of pronouns entirely. Their gender is unknown. Mizuki has light pink eyes and hair, slightly curled and worn in a side ponytail tied with a ribbon. Two even strands of hair are let loose, framing their face. They have pale skin and wear pink mascara. Their voice is powerful androgynous.