[Book 1: The Beginning] Gravity Falls Fanfic Mabel Pines and her twin brother used to love solving mysteries. Now it seems all her twin, Dipper wants to do is moan and limp all day. He doesn't have any arms, but that doesn't stop him from trying to hug her! No matter what Wendy, Stan or anyone says, she's keeping him. He's just a bit sick. Her great uncle Stan always insists on putting him out of his misery like his handyman, Soos and the other mindless zombies, but Mabel believes Dipper isn't mindless. Dipper is still the same brobro, right?