*blinks* Muah as a leader aspect? Whudda-thunk it. Or are you saying I am that perverse and crazy? ^.^ As for the Tzimisce idea, perhaps add their flavor of Vicissitude into the mix of the setting to make the alteration much more invasive.
I was a bit Tzimisce player...so, I love being the Flesh-crafter. Oh, the kinky sex we could have. Oh, the fun I could have...such delicious evil torment. ^.^
But adding in my form, I'd either be the said Goddess in disguise as a servant/shaman to do it. Although, if the main character as an icon was hermaphroditic, so thus would the deity. It'd be considered a God/Goddess. And with Tzimisce powers, that'd be as easy as pie. ^.^