Kyoto Animation, the studio behind K-On!, Nichijou, and Lucky Star, occasionally puts out limited figures of its anime, which often sell out quickly and become highly sought after items. Fourth in the line of figures based on the K-On! movie's end theme "Singing!" will be Tsumugi "Mugi" Kotobuki.
KyoAni's site has given Mugi a stop-motion introduction.