Mrs. Anderson is the mother of Filmore Anderson who was first seen in the Season Four episode "The Wacky Molestation Adventure". She was seen at the end of the episode with her son. Since, she has made countless background appearances, only with a different appearance.
Mrs. Anderson has short black hair and black eyebrows and wears red lipstick. She wears a simple light-blue long-sleeved V-neck shirt, pink pants, and black shoes. She seems to be a recolor of Elise Garrett, as well as sharing the color of her hair and outfit with Esther despite her debut appearance looking unique from other characters.
In her first appearance in "The Wacky Molestation Adventure", she had short black hair combed and wore red lipstick and black eyelashes. She wore a pink dress under a long-sleeved green shirt with a brown belt over it and black shoes.
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- "The Wacky Molestation Adventure"
- "It Hits the Fan" - Her appearance changes in this episode.
- "Cripple Fight"
- "Terrance and Phillip: Behind the Blow"
- "Super Best Friends"
- "Red Sleigh Down"
- "Child Abduction is Not Funny"
- "Stupid Spoiled Whore Video Playset"
- "Mr. Garrison's Fancy New Vagina" - Seen in the stadium, multiple versions of she and a few black versions of her are also seen in the stadium.
- "Free Hat"
- "You Got F'd in the A"
- "Two Days Before the Day After Tomorrow"
- "Hell on Earth 2006"
- "Cartoon Wars Part I"
- "Stanley's Cup"
- "Over Logging"
- "Follow That Egg!"
- "About Last Night..."
- "Fat Butt and Pancake Head"
- "The Losing Edge"
- "Le Petit Tourette" - Seen in the South Park Mall.
- "Member Berries"
- "Douche and Turd"
- "Skank Hunt
- "The Damned"