A vampire hunter. Where I'm from, she's a big deal and the Slayer, capital s. Empowered to fight us on our own terms in a way most humans aren't.

[Spike took another drink.]

It's a whole deal, with their being a chosen one, and when one dies another being called and all. Most don't tangle with a Slayer. I've killed two before, and fought this one a few times. Our situations complicated though. Like I said, you play nice and she's likely to play nice.