Sandy Cheeks

Sandra "Sandy" Cheeks is a fictional character in the Nickelodeon franchise "SpongeBob SquarePants". She is an anthropomorphic squirrel who wears a diving suit and lives underwater. Sandy is voiced by Carolyn Lawrence and first appeared in the episode "Tea at the Treedome" that premiered on May 1, 1999. Sandy was created and designed by marine biologist and animator Stephen Hillenburg, the show's creator.
Role in "SpongeBob SquarePants".
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. Inside the treedome, her normal attire consists of a green and purple bikini. Conversely, as revealed in "Tea at the Treedome", other characters must wear "water helmets" with opposite functionality when visiting her house. Sandy 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.
Development.
Voice.
The voice of Sandy Cheeks is provided by Carolyn Lawrence. Lawrence got the role of Sandy when she was in Los Angeles at Los Feliz. She met Donna Grillo, a casting director, on a sidewalk. Lawrence was with a friend who knew Grillo, and she said Lawrence had an interesting voice. Grillo brought Lawrence in to audition and she got the part.
Before a recording, Lawrence prepares when the crew sends a storyboard. She explains, "I absolutely love that! Not only do I get to read the script, I can actually see what the artists have in mind. It is an amazing process and I feel so fortunate to be able to work that way! [...] I would prefer to let the script come alive in me before a taping."
References.
 