|Manga Debut||Volume 1, Chapter 1|
|Anime Debut||Season 1 Episode 1: Dissolution!|
|Korean||Yeo Jin Yun|
|German||Antje von der Ahe|
|Also Known As||Sawako-sensei|
Epiphone "1958" Korina Flying V
Gibson SG Standard (sold by Yui, Ritsu, Tsumugi, Mio and Azusa)
Sawako Yamanaka (
As the music teacher, she was originally the adviser of the wind instrument club but was forced to also become the adviser of the new light music club by Yui Hirasawa, Mio Akiyama, Ritsu Tainaka and Tsumugi Kotobuki.At the end of the K-ON! Movie she tried to save the girls from the head teacher.
An alumna of the school and a former member of the light music club, she does not want people to find out that she was formerly a member of the deathmetal band Death Devil since she fears it would destroy her gentle image. She tries to cover her past by being mild and gentle towards her coworkers and especially to students.
Though she has a mature and gentle demeanor for the generality, Sawako (affectionately addressed as "Sawa-chan" or "Sawa-chan-sensei" by both Ritsu and Yui) displays a totally different, completely authentic character when she is alone with the light music club or really angered. In reality, she is wild, lazy and quite an irresponsible teacher who enjoys dressing up the light music club in (sometimes embarrassing) cosplay costumes like French maid uniforms, much to the dislike of Mio and Azusa Nakano.
She names the club band "Ho-Kago Tea Time" after the members take too long deciding on a name themselves. She once momentarily pitches in for Yui with her Epiphone "1958" Korina Flying V electric guitar (anime only).
She becomes the girls' homeroom teacher in their third year, and puts Nodoka Manabe and all the band members (except Azusa as she is a grade lower) in the same class so she does not have to remember too many new names.
After all the senior members of "Ho-Kago Tea Time" graduate, she becomes the adviser of the newly created light music club under Azusa's leadership, and renames the band "Wakaba Girls", being that all the members are beginners (with the exception of Azusa).
Sawako has long, straight brown hair with two long bangs reaching down to her chest. Her attire consists of a light yellow dress, complete with a black belt, a light green shirt underneath and a pairs of white heels. She also wears a red pendant and rounded glasses.