Funayurei

A vengeful spirit whose body had died in a body of water, be it a sea, river,lake or swamp. They traveled along the shores looking for anyone that looked like they wanted to cross, they offered to take them across for a few coins. Halfway across the boat disappears and the ghost drags them into the depths of the water to drown them. But since the new Demon Lord had taken over they now take any male they take a liking to to their home to be their husband. As they travel they release a subtle charm spell that makes the male extremely interested in having sex with them. Once a man gives in to his desire he will no longer be able leave her side. Once they gain a husband in this manner they will no longer pick up passengers, but sometimes their boat will be seen traveling across the water.