A secondary character of [[K-On!]]
The school's Wind Instruments Club adviser as well as its alumna, but eventually also the Light Music Club's adviser after being blackmailed by club president [[Tainaka Ritsu]] into the job on threat of revealing her past as "Catherine", vocalist and lead guitarist of heavy metal band "[[Death Devil]]" and also an alumna of the same club. In stark contrast to her mature and gentle facade, only to the members of the Light Music Club - whose stage name "Ho-Kago Tea Time" was of her own invention - does she show her more authentic personality: lazy, irresponsible and often putting the band in [[cosplay]] dresses, but also perceptive and an able mentor.
山中さわ子