The Lady of the Green Kirtle, also called Queen of Underland and Queen of the Deep Realm, is the main antagonist in The Silver Chair by C. S. Lewis. She enslaved Prince Rilian of Narnia and a horde of gnomes by her witchcraft, and planned to use them to take over Narnia. She is foiled by three friends of Aslan: Eustace Scrubb, Jill Pole, and Puddleglum, and is finally killed by Rilian.

Jadis is a fictional character and the main antagonist of The Lion, the Witch and the Wardrobe (1950) and The Magician's Nephew (1955) in C. S. Lewis's series, The Chronicles of Narnia. She is commonly referred to as the White Witch in The Lion, the Witch and the Wardrobe, as she is the Witch who froze Narnia in the Hundred Years Winter.