Hirasawa, Yui

平沢唯

Main character, guitarist, and lead vocalist. Misunderstanding "light music" to mean "easy music" (such as whistling), she joined the Light Music Club and took up the guitar with absolutely no prior experience. She is the type of person who does not read manuals, relying instead on her own intuition and self-taught methods.
Yui serves as the lead guitarist and split vocalist of the Light Music Club, playing a Heritage Cherry Sunburst Gibson Les Paul Standard electric guitar that she nicknames "Gīta" (ギー太). Before learning the electric guitar, the only instrument she knew how to play was the castanets. She receives poor grades in school (though, when properly coached, she can achieve astounding results), spaces out frequently, and is easily distracted by trivialities (mainly those she deems cute). Yui is a kind and friendly girl who holds no ill will toward anyone. She has shoulder-length brown hair (slightly longer than Ritsu's), accessorized with two yellow hair clips, and brown eyes. She has a strong liking for sweets and consumes them frequently (though she never gains weight, a fact greatly envied by Mugi, Mio, and Sawako). She has a younger sister named Ui, who is very mature and acts as Yui's "older sister," taking care of her while their parents are away on business trips. Despite her difficulties with distractions, Yui works extremely hard to improve her guitar playing. During performances, Yui plays with amazing energy and joy, which usually results in a great response from the audience.
As a musician, Yui has absolute pitch—she can tune her guitar perfectly without a tuner, which greatly impresses Azusa, who possesses far more experience with playing guitar than Yui. She has a very easy-going nature but demonstrates incredible focus and retention when she has a clear goal in sight. Yui remains devoted to her band and will always practice hard enough for the club. At school, she has become quite admired for her great voice. However, she has been shown to forget her lyrics mid-performance on at least one occasion and exert herself too much, making her unable to perform sometimes. Mio was the lead vocalist at first, since Yui could not play the guitar and sing at the same time.