Bonnie is one of four main antagonists in Five Nights at Freddy's. Like Freddy Fazbear and Chica, Bonnie is a children's entertainer during the day, housed at Freddy Fazbear's Pizza.
However, at night, he acts as the other animatronics do: hunting down any human in the area and forcefully stuffing them into a FreddyFazbear suit, killing them.
Bonnie is a lavender rabbit animatronic, with maroon eyes. He has articulated ears that can bend forward, and wears a red bow tie. Onstage, he carries an orange guitar. Unlike the other characters, he has rounded teeth, and does not have eyebrows.
Excluding his head, the majority of Bonnie's body appears identical to Freddy's, apart from the latter's color. This version of Bonnie, like most of the animatronics in the first game, seems to have no teeth on his upper jaw.
Bonnie's starting location is the Show Stage, along with his bandmates, Freddy and Chica. Upon activation, he will move to any room on the left side of the restaurant, excluding Pirate Cove. This means he can appear in the Dining Area, Backstage, the West Hall, the Supply Closet, and the West Hall Corner. When looking into The Office, he appears leaning into the left doorway from the blind spot directly behind the left door.
Bonnie is known for coming and returning to The Office more frequently than the other animatronics, and, like Foxy, he only approaches from the left side, though their similarities end there. He will stare through the doorway into The Office, unlike Chica, who looks through the window. The frequency with which Bonnie approaches The Office appears to be due to teleportation, which is noticeable with Cheat Mode enabled. Bonnie is also capable of temporarily disabling the cameras as he moves to another area, as does Chica.
On some nights, if the player does not look at Bonnie on the monitors, he will not move from the Show Stage. This is one of the best methods for surviving after Night 2, though Foxy may easily kill the player if not viewed enough, which, in this case, at all.
On the 4th and 5th nights, while standing in front of the camera outside The Office (CAM 2B), Bonnie's head and jaw twitch violently in a very paranormal manner. The Robotvoice sound byte can be heard while he is twitching, even if the player is not looking at him directly on the Monitor. On any night, he may be seen standing a few inches away from the Backstage camera (CAM 5), staring directly into it. His eyes are completely black, save for white, pinprick-sized pupils.
When Bonnie enters The Office while the player is viewing the cameras, quiet, raspy, groan-like noises are audible. Once the player lowers the camera view and returns to The Office, Bonnie will attack them and end the game. The same noises can also be heard in this situation if Chica is waiting to attack. Bonnie and Chica are capable of forcing the player to lower the monitor in order to attack, meaning the player cannot necessarily survive by continuing to view the monitor until 6 AM as previously thought.
On any night, when Bonnie is in the Backstage Area, the player can cause the game to change to the close-up of his face by simply going in and out of the Monitor. Switching to any other room before doing so will cause the scene to not switch.