Board Thread:General Discussion/@comment-12757511-20130720013429/@comment-14138255-20130807171321

my theory has Summer in the place of Crow, and Ozpin could have been to Crimson as jaune was to Ruby on her first day, but then Ozpin began seeing Summer and it left Crimson in a bad shape (giving her more fuel to her fall)

I also think Crimson was one of those soley Dust only typed fighters like Glynda and to a lesser extent Weiss), but she was unique in that she didn't need a tool to channel it through, becoming one of the most powerful Dust users in Beacon.