Bonnie is one of the four main antagonists in Five Nights at Freddy's, an animatronic bunny and children's entertainer who lives with Freddy Fazbear and Chica at Freddy Fazbear's Pizza. When the first Freddy Fazbear's Pizza opened in 1983, the guitarist. In 1987, both she and the original animatronics were in serious disrepair, and Bonnie was replaced by the new villain of her "improved" Freddy Fazbear's Pizza, Toy Bonnie. Bonnie is an indigo animatronic bunny with blue accents, magenta eyes, and a square muzzle. The color of his muzzle, belly, and inside of his ears is lilac. While Bonnie appears purple in Artwork and Special Delivery, in most of the games he and his opponents appear in, including FNaF World, his dark blue is darker than purple. This may indicate that he used to be blue, but Got a purple paint job under unknown circumstances, hence the blue splotches. Freddy Fazbear's pizza theme song reveals Bonnie's personality based on a rock musician; boastful, and proud, with a speech pattern of the laid-back hippie stereotype.

Toy Bonnie is the re-designed counterpart of Bonnie in the past, first appearing in Five Nights at Freddy's 2. He was the guitarist at the newly renovated Freddy Fazbear's Pizza in 1987. The pizzeria was closed after only a few short weeks of operation, with Toy Bonnie and other toy animatronics being scrapped due to possible malfunctions. Of all the redesigns, Toy Bonnie seems to have undergone the most drastic changes, excluding the Mangle. His body is bright, shiny blue, with a pale blue belly, muzzle, and inside of his ears. He has green eyes, magenta lids, long eyelashes, and rosy cheeks. He also has a white round tail that can only be seen when crawling through the right vent. He has eyebrows, unlike the original Bonnie, and no longer bears a resemblance to Toy Freddy in appearance. Compared to the original animatronics, he has smoother textures and a more modern look, with articulated fingers and a hard shell, unlike the original's fabric cover. He seems smart enough to use people's insecurities to hurt people psychologically and emotionally, which shows how petty and arrogant he is.

Shadow Bonnie, also known as RWQFSFASXC or simply RXQ, is Toy Boonie's mysterious shadow counterpart, first appeared in the Easter eggs of Five Nights at Freddy's 2 and in subsequent games. RWQFSFASXC is a shaded silhouette version of Toy Bonnie with white eyes and teeth. He appears to have a full set of visible teeth, as opposed to Toy Bonnie's buck teeth, with an extra pair of teeth on top. He also appears to be shorter, and his torso and pelvis are more clearly defined. It is not clear whether these differences are in any way related. Aside from being mysterious and slightly ominous, nothing can describe RWQFSFASXC's personality.

Spring Bonnie, occasionally spelled Springbonnie, was the earliest iteration of Bonnie and was an entertainer in Fredbear's Family Diner, along with the diner's mascot Fredbear. They made their debut in Five Nights at Freddy's 3. They later became Golden Freddy and Springtrap respectively. The two cartoons are the only ones known to be equipped with "snap locks," mechanical devices attached to the character suit's endoskeleton that can be retracted with a hand crank, allowing the suit to be worn by humans. However, snap locks had a fatal flaw, and that was their high sensitivity to water, as a single drop was enough to cause the entire system to contract, crushing anyone wearing the suit at the time. The last time it was used was by Afton to hide from his past victims, but the flawed mechanism malfunctioned, causing the compressed endoskeleton to pierce from the inside and kill Afton. Although dead, Afton will return in a few decades, his soul fused with Spring Bonnie animatronics to become Springtrap.

Nightmare Bonnie is a Nightmare variant of Bonnie that first appeared in Five Nights at Freddy's 4. Nightmare Bonnie is a blue-purple run-down animatronic bunny. Many of his features are exaggerated beyond reality, such as his sharp teeth, prominent jaw, and claws. Certain parts of him have lighter shades of purple, such as his muzzle, chin, inner ear, and abdomen. A large tear ran from his upper body to his hip, almost completely exposing the underlying endoskeleton. Like all other nightmares, Nightmare Bonnie's head appears to be split in two for unknown reasons, causing him to open his jaw. He has two sharp teeth. Most of the material around his eyes disappeared completely. His ears were bent at steep angles, and there were multiple tear marks on them. Nightmare Bonnie is portrayed as a cruel and menacing animatronic who only wants to hurt his victims, making him the exact opposite of his original character, Bonnie.

Jack-O-Bonnie is a Halloween-themed revamped variant of Nightmare Bonnie, first appeared in Five Nights at Freddy's 4, where she replaces the original villain in the Halloween edition. Aside from the Halloween-themed colors, his appearance looks identical to his original variant. Jack-O-Bonnie is not blue-violet, but brown-orange. His muzzle, chin, abdomen, and the inside of his ears were dyed orange-red. In place of his normal endoskeleton eyes, the eye sockets glow orange and yellow like a real jack-o-lantern. His teeth glow yellowish, allowing his endoskeleton jaw to glow in low light. Similar effects appear to have been applied to his entire body in shiny yellow as they can be seen on the torso and some endoskeletal parts. Several parts of Jack-O-Bonnie's left hand look green instead of brown-orange. Like his original counterpart and other nightmare animatronics, Jack-O-Bonnie is a ruthless, intimidating creature who hunts down his victims like a predatory beast.

Rockstar Bonnie is another redesigned version of the original Bonnie, first seen in Freddy Fazbear's Pizzeria Simulator. His cheeks, eyelids, and knees were magenta. He has green eyes, a brighter red bow tie, and two gold star buttons on his chest. Like other "rock star" animatronics, his head and jaw appear to be separated, with buck teeth under the muzzle and more teeth in the lower jaw. He plays a red/orange electric guitar with two straps. Rockstar Bonnie also often has a tendency to be clumsy, as he occasionally loses his guitar and needs the player to find it, which suggests he's clumsy, and his lack of knowledge about not remembering where he lost his guitar may also suggest that he's a bit lazy and selfish.

Glamrock Bonnie is one of the revamped punk rock-themed characters from Freddy Fazbear's Mega Pizzaplex, first appearing in Five Nights at Freddy's: Security Breach. Glamrock animatronics features more anthropomorphic designs than previous characters and wears punk accessories with an '80s theme, namely face paint, oversized shoulder pads, slightly spiked bracelets, and other types of jewelry. Their technology seems relatively advanced as they are able to move freely (unlike typical animatronics which can only move in a fixed pattern) and everyone seems to have very advanced artificial intelligence and self-awareness as they are able to hold and start without being fixed Reply to the conversation with almost complete free will. Glamrock Bonnie is animatronic that appears in Freddy Fazbear's Mega Pizzaplex sometime before the game begins. For unknown reasons, he was retired and replaced by Montgomery Gator. According to employee logs, many kids asked where Bonnie was, which led Pizzaplex employees to consider removing references to Bonnie from that location, including his bowling alley. In a security report log, it is said that Bonnie was last seen entering the Gator Golf course. One of many theories speculates that Bonnie was destroyed by the Montgomery Gator, most likely due to Monty's aggression.