Margaret  SquarePants (nee BubbleBottom ) (more commonly referred to as  Mrs. SquarePants), is Harold SquarePants' wife, SpongeBob SquarePants' mother, the daughter-in-law of Grandpa SquarePants and Grandma SquarePants, the aunt of Larry, Todd SquarePants, BlackJack, and Stanley S. SquarePants, and the great-grandmother of SpongeBob's grandson. She is voiced by Sirena Irwin and first appears in the episode " Home Sweet Pineapple."
She has black hair and is dressed in a purple matchbox dress with matching sleeveless pantalettes with purple high heels and wears a pearl necklace. She is an orange sea
sponge with light brown pores and light blue eyes.
She was born as Margaret BubbleBottom to Mr. and
She married Harold SquarePants and changed her name to Margaret SquarePants.
She had one child, named SpongeBob SquarePants.
She once told SpongeBob to never run with a broom.
She always told SpongeBob not to look for trouble.
She now lives only with her husband since SpongeBob moved out.
Role in series
Her and her husband come to pick up SpongeBob after
nematodes ate his pineapple house. In this episode, when SpongeBob is in his parents' boatmobile, he says "Goodbye Bikini Bottom!," which indicates that his parents do not live in Bikini Bottom.
Margaret and Harold watch the
Krusty Krab talent show.
Margaret and Harold give their son a boatmobile for passing his driver's test.
She and Harold seem sad that SpongeBob does not have
his driver's license, saying "Even Patrick has a license."
She drives SpongeBob and Patrick to the
Great Barrier Reef as part of the vacation.
The Q&A section of the official website for New Zealand states that her name is "Claire Gretchen SquarePants." SpongeBob SquarePants This however, is false.
 In the end credits, she is listed as "Mom," and sometimes "Mother SquarePants."