Kokona is a 16-year-old high school sophomore. She has been fascinated by the Sirius theater since she was a child and auditioned to join the company to become a World Dai Star. She has a cheerful and friendly personality who can get along with anyone. She lacks confidence in her performance and skills, and often becomes timid. But she admired and strongly trusts her best friend, Shizuka, who is always so confident.