Capri Flanders
Mona Flanders is the mother of Ned Flanders and the wife of Nedward Flanders Sr. She is a beatnik. She is seen in the episodes "Lisa's First Word" when Ned introduces "Grandma Flanders", where she is visibly aged and senile. A much younger Mona Flanders is seen in "Sweet Seymour Skinner's Baadasssss Song" when Ned has a flashback about his parents and "Hurricane Neddy" when she and her husband bring Ned to Dr. Foster. She is also referred to in "Lisa's Date With Density". Due to her advanced age in "Grandma Flanders," it seems likely that Mona is dead by the 'current' Simpsons timeline. However, in "Homer Loves Flanders," Ned mentions that Rod and Todd do still have at least one living grandmother. It is not clear however if this is in reference to Mona, or to Maude's mother.
Her name may be a reference to Homer's mother Mona Simpson.