A 4th grader in the same class as Ririka at White Dove Academy (), Miyuki considers it her duty to insure that other students' behaviors don't reflect poorly on the school and is often criticizing Ririka and Seiya for what she perceives as inappropriate behavior. Miyuki has a crush on Kanou-senpai and forms the official Kanou-senpai fan club, however she is constantly frustrated that Kanou ignores her and pays attention to Ririka instead. Extremely sensitive about the size of her forehead, Miyuki is also extremely scared of dogs. Miyuki is the daughter of the head of Kuwano General Hospital and is almost always seen together with two girls who appear to be her flunkies.
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