Joker

A mysterious mage shrouded in a black robe. It sees all humans other than itself as little more than test subjects for its magic. Joker is usually found in his laboratory conducting research on magic, but when he goes outside, it is mostly for searching for a subject to test his magic on. It is said that he wears a jester's attire under the robe, but that assumption simply came from the image one gets from hearing the name "Joker."