original_query: Who is Mason "Dipper" Pines?
query: Who is Mason "Dipper" Pines?
answer: Mason "Dipper" Pines is a fictional character and one of the two lead characters in the Disney Channel animated series Gravity Falls. He's a 12-year-old boy who spends his summer vacation with his twin sister Mabel in his great uncle's tourist trap, "The Mystery Shack", in Gravity Falls, Oregon.  He's curious, clever, and inventive, trying to solve the mysteries of the town with the help of a journal.