Dementia is a nanny who was hired by Cousin Itt and Margaret to take care of their baby, What.
Upon seeing her come in, Fester is immediately attracted to her, a sentiment which she likewise returns. The two are implied to be similar, most significantly in terms of their physical appearance.
Later, during Gomez's toast at Pubert's party, the two are seen to be close together, happy, and smiling at each other when Gomez toasts "to new friends".
Her name, she states "means insanity".
Appearances[]
The feature film:
Background Information[]
She was played by Carol Hankins.