生駒 結衣

Mio's cousin who also lives in her neighborhood, and a member of the school's swimming club. She loves the rice Shiori cooks, so she often crashes into Yui's house. Similarly to Mio, Yui is a very hardworking and diligent person, but tends to be overly serious at times too.

She isn't all that sure about her future, but wishes to become a coach and PE teacher. During school she often hangs out with both Mio and Rinka.