While Genevieve is the perfect match for Drachenfels lore-wise, to paraphrase what I said in the Unofficial New Character Poll thread, I like our humble motley crew of (previously) unheard of heroes. While I’d be all for a sixth character either way, and I’d be happy with Genevieve, I’d prefer it be someone new.
For a young vampire (ie turned in the past few years) there’d be plenty of potential to tie her into Saltzpyre’s backstory, eg a mission that went wrong and she was turned as a result, perhaps he and his fellow WH’s got played and without her they would’ve perished, so there’d be the element of guilt in there, which would be interesting. Perhaps he even put her down at the end (or thought he did), and she got brought back to unlife. Then they (her and the Ü5) cross paths later and she saves a bad situation.
It’d be neat to have a new character the party doesn’t trust at first but has to work with, and has mixed feelings over.