Stanley "Stan" Pines, better known as Grunkle Stan ("Grunkle" being a play on the words "Great Uncle") and formerly known under the assumed identity of Stanford Pines, is Mabel and Dipper's sly, cranky great-uncle and the tritagonist of Gravity Falls. He runs the Mystery Shack, a tourist trap full of questionable oddities and mysteries. When he's giving tours or sleeping on the couch, Dipper and Mabel are usually sneaking out to explore the town’s secrets.