A main character of K-On!. She is often referred to as simply "Mugi" by her classmates.
The Light Music Club's keyboardist, playing a 76-key Korg Triton Extreme. Sweet, gentle, and hailing from a wealthy family, Tsumugi also brings tea and confectioneries to her bandmates, but also has a strange tendency to be excited at the sight of two girls in intimate interaction.
