Height: 163cm

Birthday: June 30

Zodiac: Cancer

Blood type: B

Instrument: Oboe

A first year oboe player in Kitauji Concert Band Club. She is said to look like a gyaru, with light auburn hair and yellow eyes. Ririka has a light and cheerful childlike personality. She tries to build a good relationship with Mizore Yoroizuka. However, according to Kanade Hisaishi, Ririka is aware of her ability to pass off any rude or suspicious behaviour as innocence with her smile. When she needs to sneak up to someone, she coldly calculates to use it.