Dipper Pines cares for the members of the Cipher Wheel, but doesn't realize that some take advantage of him. Some members pity him, but are scared that it would happen to them. Bill notices this so he tries to capture him to break him out of this slave/servant role that the Cipher Wheel places him under. Idea given by @Akystaracer22 I don't own Gravity Falls or it's characters, they belong to Alex Hirsch I also don't own the picture used for the cover...it belongs to it's creator