She admired Izumi Sano the moment she saw him high jump on TV. She pretends to be a boy in order to enroll into Sano's school, thereby allowing her to get closer with Sano. She loves sweet food and she is a very fast runner, initially causing all the three dorms in Osaka High to desperately recruit her. Mizuki falls in love with Sano, but is unable to tell him because she thinks that he doesn't know that she's a girl, though unbeknownst to her Sano knows her true gender and feels the same way about her. She amusingly wants to be a dog trainer and is very close to Sano's dog, Yūjirō. « less