Just don't give her the OK to move in. Do like everyone has said and talk to the hall director...if you HAVE to have a roommate, tell them you want someone else who's more compatible with you. Seriously, this sounds like a disaster waiting to happen. I've had two bad roommates (not that they were bad people, we just didn't get along), and it's not fun--and if you know up front that it won't work out, save yourself (and her) the trouble of possibly becoming mortal enemies. Well, maybe not THAT, but you know...
