(Your Bipper (Bill in Dippers body))

You were mad at Dipper for stealing your book that he needed so bad. Because you wanted revenge,you stole his body and he was now a ghost. Mable already Knew, but the ohters didn't,like:Stanford,Wendy ect. After you stole his body,his eyes became yellow with black lines as pupils. Dipper tried to get his body back...but failed.

Dipper:"Give my body back Bill!..."

He yelled. But sadly,only you and Mable could hear him yell that.