陵 瑞希

The first friend Ryou made when he enrolled in the new school. When they first met, Ryou assumed Mizuki was a girl. Mizuki very perceptive and understanding of a maiden's heart so Mizuki gives Ryou a lot of advice about girls while also promoting a relationship between them of more than friends. Mizuki's clan is know as the one who controls the city and is very strict, causing a lot of pressure to fall on Mizuki, resulting on Mizuki having ocasional violent anger outbursts.

Mizuki is a girl that was born with a penis, in other words, a hemaphrodite, a condition that is hereditary in her clan. However, while the male part can become erectile and ejaculate "something alike semen", it cannot impregnate women, and her female part is completely functional and fertile. Because of this she can't be considered a male, nor inherit the family's head position. Because there's no young male in the line of succession the clan to blames Mizuki for being born the way she did. On the day of the storm, she was saved by Ryou, who instantly realized she was a girl even tough she was dressed as a boy and treated her like a girl. She fell in love for him since./

Future: In the prologue's future, Mizuki isn't directly mentioned, but Mayuri says there were rumors about someone from that school that lost control in anger and killed a servant and was arrested...