Mizuki Kawashima  

, 川島 瑞樹

Mizuki was previously a newscaster but has decided to pursue a career as an idol. Although she is approaching her 30s, she takes great care of her appearance and competes with younger idols. Her self-consciousness about her age extends to not having a romantic partner. She serves as a role model for some other idols, such as teaching Karin Domyoji how to speak more clearly. Mizuki is mature, hardworking, and often assures the Producer that he can rely on her whenever he needs. In her free time, she enjoys cleaning and doing laundry, even offering to clean up the Producer's room in a comment on one of her SR cards.