Board Thread:Speculation House/@comment-99.135.193.166-20140809044934/@comment-96.254.157.84-20140809045831

I've thinking that Cinder's vendetta might be with the SDC (perhaps Schnee was responsible for Summer's death or something). That might be a reason why the White Fang are willing to work for her: they have a common enemy. And the person Cinder might have been looking for in the hallway was Weiss, but was caught by Ruby, whom she met once before and probably feared Ruby would catch on.

That's my theory anyway.