Maude Flanders (ghost)

Maude Flanders' ghost was the spirit of Ned's deceased wife.

History
The Simpsons and Ned Flanders hold a seance in order to contact Ned's dead wife, Maude. While praying, Bart comes in dressed as Maude's ghost and finds out that Maude's real ghost is behind him, which startles everyone. Homer and Ned admire Maude, but are terrified when she turns into a hideous ghoul. Maude then tells three horror stories, which make up Treehouse of Horror XIII.