Board Thread:General Discussion/@comment-24376757-20150403035127/@comment-24674051-20150406194652

Or, rather than making the Headless Horseman a villian, make him an Anti-Hero, and tie him into the Camelot Arc.

He is one of the Knights of the Round Table. He was beheaded during a battle, but for some reason, his body remains alive and aware. At night, he has the ability to magically remove anyone's head, and use that head to help look for his own. In the morning, the head returns to the original owner.

His full story is that he was (or rather his head was) cursed by Morgana, who is holding his head and using it for some dark magic spell. Merlin discovered the problem, and animated his body to help look for the head and thing have a body available for reattaching. The identity of the knight is unknown until you find his head, when you find out that it was Percival.