Board Thread:Speculation House/@comment-25574297-20141024020130/@comment-10390252-20141024092050

My guesses, in order of likelihood:

I'm really hoping that she's Raven; I'd love a picture of the Red Swordswoman and White Archer together.
 * 1) Yang's mother (Raven 'Yue' Blonwen, Qrow's twin sister);
 * 2) Totally new character not even hinted at before;
 * 3) Adam Taurus's twin sister who, like Blake, has rejected White Fang's new path and is fighting to undermine the new leadership;
 * 4) Future AU version of Ruby come back to get a second chance to save the world;
 * 5) Summer Rose.

If she is one of that team, then we see that the 'parent' team also had the Red, White, Black, Yellow colour motif too!