| The subject of this article is non-canonical.|
While created as part of licensed material, it has not been confirmed as part of the "real" Buffyverse.
Changeling faeries were a variety of fairy who had the purpose of protecting abused women, similar to Vengeance demons. Cassie Koeing prayed to have her abusive husband Robert Koeing taken care of. Cassie was transported to another dimension and replaced by a changeling faerie who took her place and drove Robert insane until he had been dealt with.