Nightshade (Magic Kingdom of Landover)

Nightshade is one of the main antagonists of the Magic Kingdom of Landover series. A centuries old witch, Nightshade was the daughter of a human mother and a fairy father, and turned to evil when her parents abandoned her. She was outcasted from the fairy mists and resides in the forest of Deep Fell. She is King Benjamin Holiday's archenemy, and his most recurring foe.

Trivia

 * Nightshade is the only antagonist in the Landover noves to appear in all six books.