Mari Mizuno (水野 鞠 Mizuno Mari) is one of Aki Adagaki's self-proclaimed body guards who doesn't particularly like Masamune Makabe and she is the brains of all the schemes against Masamune and has two cronies, Kikune Kiba and Kaneko Sonoka.
Mari has neck-length black hair that is styled in a bubble bob haircut with bangs parted to the left, dark-blue eyes, a white headband red square-rimmed glasses. She may seem a bit shy though she is pretty intelligent, even looking the part.
Mari is seen rather nice around many people other than Masamune Makabe. But she does get angry quite easy
- The name Mari means "ball" (鞠).
- Mari's surname Mizuno means "water" (水) (mizu) and "field, wilderness" (野) (no).