jasin said:Any particular reason why it needs to be a Succubus, then, rather than a Really Hot Chick?
No. Any really hot chick whose goal is to lead an entire nation into damnation or manipulate its ruler into doing the bidding of the Nine Hells will do.
But being able to change your appearance at will probably helps. And actually being someone from the Nine Hells instead of a third party that probably helps keep your agenda from diverging too far.