Board Thread:Theories/@comment-27440185-20160604231819/@comment-24947676-20160609075528

This is actually correct, though Goldie-chan is actually a fan made nickname since, until Jackboog21 informed us, we didn't know her original name.

In the very old builds, Yui Rio, Yuna Hina, Koharu Hinata, Mei Mio, Saki Miyu, and Kokona Haruka were named after K-On! characters; Yui Hirasawa, Mio Akiyama, Ritsu Tainaka, Tsumugi Kotobuki, Azusa Nakano, and Nodoka Manabe. Before they had portraits, their hairs were all ponytails, though they had different colors (Red, Yellow, Green, Blue, Cyan, Purple).

With time, the girls got different hairstyles (RightTail, LeftTail, PigTails, TriTails, TwinTails, Drills), their names were shortened, and eventually those names were changed altogether, and their hairs were redesigned.

However, with those changes said, it is an undeniable fact that Yuna Hina was, once upon a time, Mio Akiyama. Or, as we like to call her, Goldie-chan.