Yako Mitsuya

Yako is a cheerful, energetic third-year student at Hoshimiya High and a supporting romantic interest to Riku. Also Umimi Inami's close friend from middle school. She's known for her direct, bold, and action-oriented personality—once she develops feelings (often sparked by simple acts like tutoring or compliments), she pursues them openly and persistently without hesitation or hidden motives.