Oh man, I apologize in advance for George. If he ever gets wind of the fact that there's a human in town with (his words) 'a skewed perspective on bloodsucker culture and a yen for self-destruction' he is probably going to unleash. He doesn't perspective-take well and he doesn't have much respect for people who'd choose a path that would lead to feeding on other people, no matter what the reason.
Cecil, however, would have some pity. Turning her is out of the question (he's very particular and a bit too busy to really mind any new 'children' anyhow) but I think he'd be much more sympathetic.
The others wouldn't have the same immediate reaction, but I offer Tom and Olly up for plot too.