Mio Akiyama (秋山 澪, Akiyama Mio?)
Voiced by: Yōko Hikasa
Mio is a shy girl who is in the light music club and plays a left-handed, 3-Color Sunburst Fender Precision Bass (Fender Jazz Bass in the anime), with a tortoiseshell pickguard. She originally intended to join the literary club, but is forced into the light music club by her childhood friend and the club's drummer, Ritsu. She gets excellent grades in school, but is bad with listening to stories involving macabre experiences, and cowers whenever something gross is brought up. While she can be mature and strict sometimes, she gets embarrassed easily, and is often subject to teasing from Ritsu and Sawako, their club adviser. She cites that she chose bass since it is not the center of attention in the band, unlike the guitarist. Mio is more technical when it comes to music, and Yui often comes to her when she is in need of more guitar tutorials. She is the band's backing vocalist and takes over lead vocals whenever Yui is incapable of singing or forgets the lyrics. She writes the songs, although they feature some odd lyrics like "Light and Fluffy Time". She is left-handed and becomes entranced whenever she sees left-handed instruments. Due to an unexpected accident in one of their live performances, a fan club for her is then formed (much to her dismay considering the circumstances surrounding it), whose founding member is the former student council president, who also stalks Mio.