“Gideon’s a puppet. At the Comic Con Panel, it was implied that Gideon has five fingers for a plot-important reason. Schaal made an especially suspicious expression. Gideon is bossing his “parents" around. Bud gives Gideon whatever he demands, and his mother is terrified. It’s likely they used some supernatural power to turn a puppet into a human. Finally, there’s Bills quote: “What are you, some kind of living ventriloquist dummy?", with Gideon sweating afterwards and asking Bill how he “knows his name"..."