Хірасава Уй

Height: 154 cm

Ui is Yui's younger sister, who begins the story as a third-year junior high school student, but later enters Yui's high school the following year in the same class as Azusa. Unlike her older sister, Ui is mature, responsible and handles household chores well, though she still shares a strong relationship with Yui and has a great deal of love and respect for her older sister.

Despite being a year younger than Yui, she is nearly identical to her with her hair down and is even once able to fool the club. She possesses some of her sister's musical gift, and has a great talent for playing the guitar—she became capable of playing with the rest of the light music club band after only a few days of practice (