Elphaba is a fictional character from the novel "Wicked: The Life and Times of the Wicked Witch of the West" by Gregory Maguire. She is known for her green skin and strong personality, often portrayed as an outcast in the land of Oz. Elphaba is a complex character who challenges societal norms and fights against injustice. In the story, Elphaba becomes the Wicked Witch of the West, a title that contrasts with her original intentions. Her journey explores themes of friendship, love, and the struggle for acceptance. Elphaba's character has been adapted into a successful musical, further popularizing her story and the world of Oz.