Board Thread:General Discussion/@comment-22580009-20131101050444/@comment-22580009-20131102035226

They didn't know at the begining of the episode that she was a faunus, that was why Weiss was being so rude. It was revealed when they were agruing in the dorm room and Weiss argued more against the faunus. Blake responded with "Well maybe we were just tired of being pushed around." at which point everything went quiet and she ran out of the room. By saying "we" she included herself with the White Fang, revealing her secret to the others.