Board Thread:Speculation House/@comment-8207536-20130717184611

So Monty has mentioned that Ruby will play a special role in the story. Originally this was related to her lack of a revealed surname. I thought it would be revealed mid-season, however, we now know that her last name is Rose.

So here's my theory:  the darkness is going to, eventually, use the Dust against everybody, leaving them virtually powerless, except for Ruby, who has some kind of anti-dust or anti-darkness ability which the rose petals coming off her cloak and the dead beowolves are a manifestation of. This ties in to the importance of her surname Rose. 