Mangle

Congratulations! You have entered Freddy Fazbear’s Pizza! Unfortunately, as it is 12am the restaurant is closed right now - Mangle is going to recognize you as an intruder.
The only noise is this dark pizzaria is an occasional groan from the air vents. The once-bustling party rooms are as still as can be. Your flashlight catches a few crumbs and torn pieces of giftwrap, the only evidence anyone had even been here recently. Everywhere else was run down and dusty. No wonder Fazbear Entertainment wants to open a budget location!
On the Show Stage, there is Toy Freddy, Toy Bonnie, and Toy Chica. But is none of those three who will encounter you. The noise in the air vent gets closer as Mangle crawls through it.