Birthday: February 15

Height: 175 cm

Weight: 51 kg

Blood type: O

Ryūken is the star of Ame no Kisaki, due to her tall stature, good looks, kindness, and generally tomboyish nature. She is a member of the Drama Club, and has played several male roles. She has a great number of fans and her own fan club. Mariya himself is actually quite jealous of her popularity. She was supposed to be Kanako's roommate at the dormitories only to be run out the first night by Mariya so that Mariya could keep a close eye on Kanako. Ryūken's fans cause mischief for Kanako because they are jealous of her friendship with Ryūken.