Rui Yashio

An intelligent girl whose grades have kept her at the top of her class. She has a dry personality and aims to always be the best. She once quit violin after judging it as meaningless. However, she has since returned to the world of music after meeting Mashiro and the others. She is in charge of composing music for the band.

Composed and always wants to become first place. Although she prioritizes reality over feelings, the band has made her want to see what happens when feelings are prioritized instead. Aside from being Morfonica's violinist, she is also their composer.