That'll work well for their background, I think.  The graverobbing thing is because there's no other real way for her to stay in one place for any sustainable time otherwise, right?  Attacking live people, even if she didn't turn them, that'd set off a panic in a heartbeat.  That idea of Jaspin actively deterring suspicions of Elizabeth if people started getting suspicious - and I would expect people would suspect the new, reclusive, single woman - I love it, how he would defend and protect her.  

(Not sure if she drank from him - probably not, but at some point earlier, I considered it a possibility)
Yeah, that patches a lot of potential plot holes.

No, I think I'll keep Elizabeth as she is.  More interesting as Bela's backstory is, I think the strength of Elizabeth's will serve the story fine.  It's not like she's [i]uninteresting.[/i]  It was fun to write this response, because I discovered another aspect of Elizabeth, in how she kept thinking 'he's mine, Jaspin's mine', that she's a little unhealthy in her attachment, almost a little abusive in how she makes this choice for him against his will, because she thinks he's her property and he doesn't know what he's good for him.  Discovering character is so fun.