Agatha Harkness is a fictional character that appears in American comic books published by Marvel Comics. She is a powerful witch, typically portrayed as a sinister heroine and teacher of Wanda Maximoff, as well as the mother of Nicholas Scratch. Agatha is one of the original witches from the Salem witch trials who goes on to become a significant figure in the Marvel universe, protecting Franklin Richards as his nanny and later mentoring Wanda in the use of real magic. At one point, she had a familiar named Ebony, a cat-like creature that could sense the presence of mystical beings.