i say be very quiet until you speak with the campus attourney. i don't know the legalities of this situation, but you need to figure out EXACTLY where your rights are and how far you can toe the line. if she's on the lease, and you want her out, and she REFUSES to leave (which, given her mental condition, is definitely plausable) there are things you can do but you HAVE to do them right, because she technically, in this sue happy generation, could take you to court (at least civil court). PROTECT YOUR ASS AND YOUR ASSETS! good luck
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Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi