preternatural for sure!. I have a line here specific to vamps: the basic idea is that the vamp was in a bit of a tight spot and Ren (who is a witch) here helped him out as a one off thing, except witchblood is addictive for vamps and it also gave him the first taste of sunlight in a long while as a bonus. And that's where they are at now: the vamp doing everything and anything to get another taste.