Tsumugi Kotobuki ( () (), Kotobuki Tsumugi), also known as Mugi (), is one of K-ONfive !'s main characters. She is a wealthy, cheerful, and adorable girl with a gentle personality who plays the keyboard and is the main musical composer for the band Ho-kago Tea Time. Minako Kotobuki (Japanese) and Shelby Lindley are her voice actresses (English).
