The Westerland Chronicles
Druids are priestesses of the old gods. These were the original leaders in the fey society that existed in Westeros before man. The fey have long since gone, but a few of their descendents carry the mantle of priestess.
Fey Priestesses follow the rules for Druids in the Player’s Handbook with the following exceptions:
Fey Priestesses may only be female.
Fey Priestesses face intense bias from the Holy Church.