Mizuki Akiyama is a second-year student at Kamiyama High School. They love cute things and have an energetic, carefree, and sometimes childish personality. Rui has known Mizuki since middle school, where they bonded over being outcasts on the rooftop – Mizuki for how they dress and present themselves and Rui for his eccentric and sometimes dangerous stage ideas. Mizuki has light pink eyes and hair worn in a side ponytail. They have pale skin and wear pink mascara.