This guy's my witch on the Discworld Mud.

He is training in voodoo, and getting pretty good at it. He always has a varied collection of imps and other minions about, to better help him with his occult practices. In fact, he's usually so overflowing with imps that he'll gladly give you one if you ask nicely.

Also, its not a major thing, but I should note that his gender is a hazy territory. He was born a male. But Granny, the head witch refuses to train men. (She thinks men don't have the right intuitions for witchery). So he had to have a magical genderswap. He still looks the same, except for in the pants, and he still considers himself male (except around Granny), & he prefers pronouns he/him.