Sandra "Sandy" Cheeks is a squirrel from above water. She hails from the state of Texas and talks with a Southern drawl. Sandy first appeared in the third episode of the series, "Tea at the Treedome."
Sandy has a twin brother named Randy. Her first appearance was in the third episode of season 1 "Tea at the Treedome." She and SpongeBob both love karate. Sandy is also interested in science just like Plankton is. As seen in numerous episodes, though Sandy is seen using science for good. Sandy is usually seen wearing a white suit with a helmet with a pink flower on it. When she is in her tree dome, she is seen wearing a purple bra, a purple skirt, and green underwear underneath it.
- She is voiced by Carolyn Lawrence, who also voiced Cindy Vortex in Jimmy Neutron.