Freddy Fazbear is the main antagonist of Five Nights at Freddy's and is the mascot of Freddy Fazbear's Pizza. He is an animatronic bear who, like the other animatronics in the game, is left in a "free-roaming mode" at night, during which he wanders around Freddy Fazbear's Pizza, along with the other animatronics, until 6 AM, to prevent their servos from locking up.
