Someone on Tumblr said who voiced who.
I'm not sure if its official though except for Yang who Monty said was Barbara Dunkelman. If Lindsay is voicing Ruby, I think she needs to work on it a little more. It seemed a bit too high pitched to me.Edit: Monty did say he had to pull out Kara for White's trailer, so it's official she's Weiss. As for Blake and Ruby, I'm still not sure.