I tried many..many times to just kill this buggy NPC...but you just get stuck with her. Her ice spike default attack is close to useless and if you make the mistake of saying 'wait here' be prepared to be alone for the next 10 locations...which in some ways is good. Personally i'd rather have a follower who follows instructions. And the cure I mentioned solves nothing..shes just a buggy NPC who is no longer a vampire.