Springtrap is the main antagonist and only true animatronic in Five Nights at Freddy's 3. He is the only enemy that can end the player's game, while the Phantom animatronics can only jumpscare the player and impair their vision.
Originally referred to as "Golden Bonnie" by the fanbase, Springtrap is a heavily damaged bunny animatronic of a tarnished yellow-gold color. His right ear is mostly missing, with wires sticking out of the stump left behind. His entire body is torn and tattered, with gaping holes exposing caging and wires throughout. While both hands and feet are attached and generally intact, his legs are entirely stripped from the mid-shin down, fully exposing endoskeleton metal and wiring. Both of his eyes are properly set inside his head, and he does not typically open his mouth - instead, he wears a permanent wide grin as the material surrounding his teeth has deteriorated. The exception to this is during his second jumpscare.
He moves in a fluid manner, slinking into The Office in an almost human fashion, unlike the robotic movements of all the previous animatronics.
- Five Nights at Freddy's Wikia