Yui is the main character of K-On!. She is a member of the light music club in her school, and she plays the Heritage Cherry Sunburst Gibson Les Paul Standard electric guitar, which we coins as “Gita”. She normally does not get good grades in school, but when properly coached and effort has been made she can achieve astounding results. She is easily distracted by trivialities, mainly those considered “cute”, and is clumsy and easily spaces out. She takes a huge liking for any kind of food, and much to the other member’s chagrin, never gains weight. Yui works extremely hard to get better at playing the guitar.
She is the band vocalist and lead guitarist and can properly tune her guitar perfectly without a tuner. She is very easy-going, but has extreme focus when she sets a clear goal for herself. Unfortunately, this is limited to only one subject at a time, and other skills deteriorate.