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.
