Sawako Yamanaka (山中(やまなか) さわ子(さわこ) Sawako Yamanaka) is the music teacher of the Sakuragaoka High School and one of its alumni. During her high school career, she was a member of the Light Music Club and founded the rockband Death Devil with her friends Norimi Kawaguchi, Della and Jane, where she was a guitarist also the main vocalist of the band. She eventually becomes the advisor of the two new generations of the Light Music Club under the leaderships of Ritsu Tainaka and Azusa Nakano, respectively.