Hang on, what about Keros?Since the Kitsune all just share a communal soul (and are technically demons since individual Kitsune lack souls in their bodies), would Keros be able to have Kitsune children? Or even just have a child which isn't a Kitsune, but he attaches them to the communal soul (maybe even before they're born?) so that child is essentially just a Kitsune.

According to TheObserver:
The kitsune have always been soulless. And predate the Godswar. Funny, isn't it?