I might as well say I'm also going to put a character together.  I suppose it's reasonable to have families of youkai hunters or similar, so I could incorporate such a thing in my character's history.  Not that it'd potentially mean much in the modern day.  I'm also not sure if she'd necessarily need to be an onmyouji or the like, given my plan is to have her using a sword that is, itself, a youkai, and that's probably one way to get around some of the issues there'd otherwise be.  

I probably could also just do proper onmyouji stuff, but hey.  I like the idea of working with a sentient object that can take care of most of the supernatural work and even just straight up possess its wielder if need be.