Age: 16
Height: 149 cm (4' 10")
Weight: 33 kg
Blood type: A
Birthday: January 8

Ruka Suirenji is a dance idol and a doujinshi creator. She is a friend of Chiharu. Ruka is talented at drawing, having drawn the doujinshi Nagi and Chiharu were selling at the doujinshi convention under the pen name, Fly Dolphin. She is also a popular idol, being able to sing and dance at the same time, and has many fans. Ruka has a determined and hardworking personality, shown when she insisted on returning for work despite her injuries, and when she told Chiharu that she would take care of her own bad luck.