Sandy Cheeks is born in a warm climate somewhere in the great state of Texas, surrounded by her loving family. Even as a young squirrel, she displays an insatiable curiosity about the world and an innate love for science and adventure. She likely spent her early years exploring the diverse Texan landscape, developing her signature blend of southern charm and rugged determination.

During her formative years, Sandy dedicates herself to learning, showing remarkable aptitude in fields like science and engineering. It is during this period that Sandy hones her martial art skills. Her natural curiosity and a drive to solve problems shape her into the skilled inventor and scientist she later becomes.

Determined to expand her knowledge and push the boundaries of scientific discovery, Sandy attends a prestigious university (likely in Texas, though the specific institution is never mentioned). She excels in her studies, demonstrating a particular talent for physics, engineering, and invention. It's possible she began working on her treedome design during this time.

Before making Bikini Bottom her home, Sandy participates in an expedition to the moon. Though details are scarce, the experience underscores her passion for exploration and her courage to venture into the unknown. This experience gave her an understanding of extreme environments and fueled her desire to explore the challenges of living in unconventional habitats, perhaps planting the seed for her underwater research.

Driven by a thirst for unique challenges and scientific exploration, Sandy chooses to relocate to Bikini Bottom as part of a research project. The reasons for the project are not fully discussed, but the move represents a significant turning point in her life, marking the start of her enduring friendship with SpongeBob SquarePants and the beginning of her extraordinary underwater adventures.

Shortly after arriving in Bikini Bottom, Sandy encounters SpongeBob SquarePants and Patrick Star, forming an immediate and unlikely bond. Despite their differences, their friendship blossoms, leading to countless escapades and adventures together. Sandy becomes an integral part of their lives, introducing them to Texan culture and her scientific inventions.

Sandy dedicates her life in Bikini Bottom to scientific research and invention, constantly seeking to understand the ocean's mysteries and improve the lives of its inhabitants. She conducts experiments, builds gadgets, and explores the underwater world with unwavering enthusiasm. Her work often involves SpongeBob and Patrick, leading to both groundbreaking discoveries and hilarious mishaps.

Through a combination of Texan grit and scientific prowess, Sandy consistently defends Bikini Bottom from all kinds of threats. Whether facing alien invasion or simply protecting the town from herself, she provides a source of safety to her neighbors. Sandy is not afraid to jump in when others might stand aside.