平沢 憂 (ひらさわ うい)
A secondary character of K-On!. Voiced by Yonezawa Madoka.
Hirasawa Yui's younger sister. In stark contrast to Yui, she is far more mature and responsible, and even takes care of the irresponsible Yui. She enters Sakuragaoka Girl's High School during the latter's second year, and becomes classmates with the Light Music Club's new recruit, Nakano Azusa.