another person who's had a roommate like that, knew her from an rp community, offers spare room, seems cool online, goes batshit once you're there. i just escaped that myself, she even came up with a wild 30 day notice of "get the hell out" because she said i was saying slurs (she had a cough syrup habit and was hallucinating) so i spent said month upstairs in an office room away from her sleeping on a couch and eating takeout. same kind of interactions. also was trying to get me to fetishize her husband with her???? i'm 1.) a lesbian and 2.) in a committed relationship and 3.) what the absolute fuck. these people dont know how to handle interactions that arent purely Online, and by that i dont mean just over the internet, but in that way only Discord/Twitter/Anon Comms like this can bring out.
Re: worst behavior you have seen from RPers IRL