Chika is a preparatory student at Kouka School of Musical and Theatrical Arts.

She is Chiaki's twin sister and wants to play musume-yaku (female) roles. She is always bright and is a steady person. Chika is the type to take a step back in important situations.

She had passed her entrance exam in the previous year, but for the sake of her sister who had failed the exam, Chika took the exam again.

When she passed the music school, she was in the first year of high school.

(Source: Official Site, translated)