中野 梓

Azusa is a student in the same year and class as Yui's sister Ui, who joins the light music club and becomes the rhythm guitarist, playing a Fender Mustang electric guitar. She is a self-proclaimed novice guitarist who has been playing the guitar since she was in the fourth grade. She is more serious than the other girls, and does not like to admit how she really feels. She often finds herself bewildered by the tea parties and cosplaying aspects of the club, when she would rather just practice, and is curious about how the club is able to play so well despite their problems and lack of practice. However, she has a certain weakness for cakes and can be calmed down rather easily, sometimes by just being petted. She is constantly a victim of Yui's skinship and is nicknamed 'Azu-nyan' after trying on a pair of cat ears and meowing. Despite this, Azusa is not too good with cats. While Azusa is talented in guitar, she has trouble singing while playing unlike Yui and Mio.

In the band, she looks up to Mio the most due to her maturity and the fact that she is an experienced bassist. However, she sometimes unintentionally makes remarks concerning Mio's weaknesses, such as her weight. She also finds Mugi very beautiful, and envies her hair and large eyes, and later starts teaching her how to play guitar when the two are alone in the club room. Since joining, Yui comes to her for advice on playing guitar, as well as maintenance.
She gets a tan extremely easily, once during their time at the beach and another during a music festival (even after applying sunscreen). As a result, she frequently gets sunburned as well. She gets lonely very easily, and often worries that everyone in the club will leave her, as they are one year older and eventually will graduate. Outside of the band, she often hangs out with Ui and Jun whenever the other girls are busy. 

From url=http://en.wikipedia.org/wiki/K-On!#Characters.