Dropping this here since I mentioned it above to Andrea re: Korra... Since we're so low on purebloods, I'm thinking of maybe switching Korra's thing around? So she isn't a human who gets experimented on with vampire blood, but the opposite - a pureblood who gets some kind of weird cure thrown her way? It'd work more with the Red Lotus equivalent wanting to DEpower her rather than empower her with vampire abilities, in the end. And if the experiments made her kind of messed up like at the start of Book 4, she could be used for turning shenanigans if necessary.