Sandy is a close friend of SpongeBob SquarePants. She is a proud Texan and speaks in a stereotypical Southern drawl.
In order to live underwater, Sandy resides in a bubble-like dome and wears an atmospheric diving suit when outside her house.
She possesses extraordinary scientific skills such as the ability to construct complex inventions.
Sandy is shown to possess a number of tough, tomboyish character traits and interests; she is skilled at karate, engages in bodybuilding,and is a rodeo champion.
She is also a close friend of Patrick Star, SpongeBob's best friend and neighbor, though she sometimes gets annoyed by him like Squidward.