Now consider that Glitchtrap first manifested in the Fazbear Virtual Experience after the developers scanned a bunch of old circuitboards sent to them by the client, IE Fazbear Entertainment.

However, in doing so, Jake would unintentionally be putting more and more pieces of William's spirit in one place, presumably making him stronger and allowing his true identity to resurface. Now consider that Epilogue 4 ends with Jake resolving to track down all the infected items and stop them from hurting more people based on Epilogue 2 opening with the Stitchwraith collecting pieces of the Plushtrap Chaser, it seems likely he followed through on this. If this is the case, then that would mean that all of the items infected by Andrew- likely including several of the antagonists we see throughout the stories- would contain a piece of William's spirit, explaining their malicious behavior.

It's made clear by Epilogue 4 that the 'hitchhiker' is malicious in nature, turning what was meant to be a harmless prank into a lethal attack as of the publication of Book 4 there's no definitive evidence that William is the hitchhiker in question, but given that the series doesn't really have any other human antagonists (other than the Older Brother and the faceless heads of Fazbear Entertainment), there's not a lot of possibilities. The 'hitchhiker' on Andrew's spirit is William, and the Stitchwraith Epilogues are the origin of 'Glitchtrap'.Scott has made it clear that these books are meant to provide some answers about the leftover mysteries from the last couple games, and the question of how Glitchtrap came into existence is probably the biggest one.

Five nights at candys 3 demon