You were one of the amazing friends of the Pines family, a person wanting to belong and be appreciated in the world, and when they came to visit that summer as the car containing them dropped them off at the Mystery Shack, you ran up to them and hugged Mabel and Dipper simultaneously as they notice you acting a bit weird around them but not suspect anything. However you knew that you shouldn't let them know the truth, you were secretly a beast, not mindless or a killer, but a beast that wandered around the woods, looking for people to be friends too, but every time you did, people would run away from your appearance as you only turned into a beast on full moons, and it was that night, everything was gonna change. When sitting outside of the Mystery Shack, near the steps, Mabel went out and sat next to you, as you both talked about whatever, you looked up and noticed the moon, your curse, your transformation began, you tried to run but Mabel followed you to the middle of the forest as you transformed to your full form.
M: "Woah . . ."