Height: 163 cm (5'3")
Instrument: Oboe

Ririka is a first-year student of Kitauji High School and an oboe player in Kitauji Concert Band Club.

She has a light and cheerful childlike personality who tries to build a good relationship with Mizore. However, according to Kanade, Ririka is aware of her ability to pass off any rude or suspicious behaviour as innocence with her smile. When Ririka's interested in something, she starts from the beginning and goes step by step.

Her special skill is making friends.