Alongside her twin brother Dipper, she was sent from Piedmont, California to the small, sleepy town of Gravity Falls, Oregon to visit their great uncle, Grunkle Stan and stay the summer where she and her brother frequently encounter the supernatural. Armed with her grappling hook that she found in the Mystery Shack gift shop, her and Dipper work together to navigate their way around odd, new surroundings and seek out and uncover the town's mysterious secrets. Mabel is associated with the shooting star symbol.
Mabel is an energetic, fun, bouncy, hyperactive, enthusiastic, clumsy and free-spirited girl. She is an optimist who skips through life with a braces-filled smile and an assortment of extremely colorful knit sweaters. It is Mabel's outgoing personality and fearless curiosity that comes in handy when Dipper needs help solving a mystery, even if she isn't always aware of her silliness. She shows a more sophisticated attitude when it comes to art.
Despite all the weirdness in Gravity Falls, Mabel is always a "glass-half-full" kind of girl. She is rarely angry or upset, and generally keeps a positive outlook. Despite her cheerful attitude, Mabel is shown to be quite sensitive, as she can occasionally get her feelings hurt. She is also somewhat naive at times. However, like her brother, Mabel has the best of intentions and she will always try to choose the right options for the happiness of herself and others.