A second-year student who is a member of the string orchestra club, and she's in charge of the viola. Riria is Japanese from her father's side, and Finnish from her mother's side. She only knows how to speak basic Japanese. When she was in elementary school, she moved to the same class as
Nao and
Chizuru, and she quickly ended up becoming friends with them.
Riria has a very carefree and mischievous personality. She enjoys teasing both
Ayami and
Mai a lot. However, when she performs, Riria dons a serious and passionate expression on her face. She started playing the viola after meeting with Chizuru and Nao.
Riria's father is also an artist, and she enjoys drawing as a hobby as well.