Nightmare Fredbear—the monstrous counterpart of Golden Freddy—is characterized by a sadistic, composed, and mocking personality. As the nightmarish manifestation of the Crying Child's trauma, he acts as an active tormentor. In Ultimate Custom Night, his dialogue reflects a malicious enjoyment in hunting, where he states: "We know who our friends are, and you are not one of them," and frequently taunts his victims about his teeth and dismantling them.He operates with deliberate cruelty, contrasting the unpredictable, ghost-like behavior of the original Golden Freddy. While classic Golden Freddy is an enigmatic, ethereal spirit who teleports, Nightmare Fredbear is an aggressive predator who stalks his prey, laughs maniacally, and speaks in a composed, arrogant manner.