Stan Pines, often referred to as "Grunkle Stan," is a fictional character from the animated television series Gravity Falls. He is the great-uncle of the main characters, Dipper Pines and Mabel Pines, and runs the Mystery Shack, a tourist trap filled with oddities and curiosities. Stan is known for his gruff demeanor, quick wit, and a strong desire to make money, often leading to humorous situations. Despite his rough exterior, Stan cares deeply for his family and has a complex backstory that reveals his past adventures and struggles. Throughout the series, he demonstrates loyalty and resourcefulness, often helping his great-nephew and great-niece navigate the mysteries of Gravity Falls.