Yamanaka Sawako is a teacher at Sakuragaoka High School, serving as advisor to the brass band club and light music club. A graduate of the same school, she was formerly a member of the band Death Devil in the light music club. Known for her beautiful appearance, eloquent speaking, and rapport with students, she has a fan club. Her demeanor shifts dramatically when discussing rock or instruments, revealing her wild side developed after joining the club to impress a boy who liked 'wild girls'.