When life gives you lemons, draw faces on those lemons and wrap them in a blanket. Ta-daaa! Now you have lemon babies.
Mabel Pines is the slightly elder (by five minutes) twin sister of Dipper Pines and is a curious, clever, and inventive thirteen-year-old. Sometime during the month of June in an unspecified year four years ago, Mabel and her twin brother Dipper were sent from their home to the mysterious town of Gravity Falls to stay with their Grunkle Stan, who runs a tourist trap named the "Mystery Shack" that doubles as his house. With her brother, Mabel has been endeavoring to uncover the secrets of the bizarre backwoods community over the course of several summers.
At the time of the Fusion Invasion Mabel was launched by an otherwise harmless beam of light all the way to Murky Woods; it was unclear at first who was behind this, but it was later revealed to be Li'l Gideon. Mabel uses the opportunity of the player's being in Murky Woods to ask him to steal Gideon's diary in the mission "Li'l Destruction." In this mission, in order to prevent Gideon from sending love letters to her, Mabel asks the player to go to Volcano Mountain and destroy the diary which he uses for material. Mabel asks the player to read it first, and as the player does, it is revealed that Gideon was behind the mysterious beam of light. Before the volume (which turns out to be a mystery manual) can be destroyed, however, Fusion Dipper steals it. The player follows the Fusion to its Fusion Lair, and must fight many Flame Zombies before defeating it. Fusion Dipper, however, escapes with the mystery manual. The player must fight Fusion Dipper and Fusion Gideon before reclaiming the volume.
Mabel is based on Gravity Falls' creator Alex Hirsch's sister and his reminiscences of their activities together in summer camp.
Like most other child characters in FusionFall, Mabel has been aged up to a teenager.