User blog comment:Zathronas/Analysis by an author: Is there a traitor at Beacon?/@comment-24117358-20140720053724

Well you are right about a traitor being an interesting development plot/story wise. But again there really isn't much evidence at the time to say that there currently is a traitor in Beacon. Given the Volume 2 trailer I think it will be possible that Emerald and Murcury will "become friends" with team RWBY, since they are obviously already undercover in Beacon.