When we talked about it, people seemed kinda split on whether to make an edge like this available for RP reasons, so the edge wasn't included (or written) when we were adding/upgrading familiars.

It might be included at a later date, but it would probably be fairly expensive. If you know there is a familiar you don't want at all, Abernyte is right that deleting and starting over again is probably the best move from a powergaming viewpoint.

If you want to talk about a specific familiar, feel free to email me at adekar.thoreksar@gmail.com and I can respond or forward issues to staff members that code familiars.