She is currently in the same year and class as Ui Hirasawa and Jun Suzuki, and has quite a mysterious demeanor. She is a self-proclaimed novice guitarist who has been playing the guitar ever since the fourth grade, while her parents are working in a jazz band.She joins the light music club during the middle of the first season. She is often exasperated by the tea and sweets served by her club mates, and by the odd costumes they wear. However, she has a certain weakness for sweets and can be calmed down rather easily, sometimes just from being petted. She gets a tan very easily, once during their time at the beach and another during a music festival. Azusa is often frustrated with the club's aloof behavior, but she tends to get roped in inadvertently, and ends up enjoying herself as well. She can get embarassed and shy, much like Mio. Azusa worries alot for her friends, especially her lazy senpai Yui. She is also very smart and takes care of Yui when she can, making study plans for her, teaching her guitar, and cheering her up by meowing or cosplaying for her.After the original four members graduated, she succeeds Ritsu as the club's president. In the manga, Jun and Ui both joined the club immediately after the seniors graduated. However, in the anime, it was revealed in episode 26, which takes place before episode 23, that to Yui's delight, Jun and Ui were practicing with Azusa in preparation for the year's school opening session. This implies that Jun and Ui joined before the seniors graduated, in the anime.She gets her own unique storyline in her senior year at high school in the latest manga issue with Jun and Ui.