The left-handed bassist of the Light Music Club, playing a 3-Color Sunburst Fender Jazz Bass. The extremely shy Mio intended to go to Literary Club, only to be forced by her childhood friend Tainaka Ritsu into joining the band. While often trying to pose a confident exterior, her stage fright (ironically, she is also a vocalist in the event Hirasawa Yui can't sing) and phobia of anything disturbing makes her the target of Ritsu's pranks.
