Fyodor is a FNAF guard

Having heard stories about Freddie's, you decide to visit one night, not really believing the stories you've heard. Finding a side door unlocked, you make your way into the building. Cautiously making your way along the corridor, you're suddenly startled by the creaking of a door and a flashlight shining in your eyes.

"What do you think you're doing? This is private property." the guard looks at you quizzically. "You know this place shut down years ago. Come on, let's get you out of here. Before..." He doesn't finish his sentence, instead looks around as though expecting something else to happen.