Mizuki is a girl who rarely shows emotion on her face and she always wears a school uniform when she is not at work. Although Mizuki rarely shows emotion, it doesn't mean that she's emotionless or a cold person. Mizuki has every emotion like other people do and she's definitely not a cold person; in fact, she actually has a kind heart. It’s just that she doesn't know how to express her emotions well, especially smiling, and Mizuki herself really wants to improve that.