Phantom Puppet is an illusion of a burnt and damaged Puppet that first appeared in Five Nights at Freddy' 3. Phantom Puppet has a terrifying appearance, his body is scorched and his eyes have small white pupils, just like other Phantoms. Its charred appearance may herald the burning of the attraction. Its three buttons are also dark in color, with the top button nearly broken in half and the bottom one cracked, which is evident when its extra menu renders brighten. The Phantom Puppet appears briefly in CAM 08 and then appears in the office, depending on whether the player changed the monitor's perspective before dropping the monitor. Once inside the room, the Phantom Puppet cannot be driven away and must leave on its own, which takes about 17 seconds. During this time, it gives Springtrap time to get closer to the player, while also making the player vulnerable to other Phantoms, notably Phantom Freddy and Phantom Foxy, who can both attack almost instantly, even while the Phantom Puppet is still in the office when.

Nightmare is a recolored and slightly translucent version of Nightmare Fredear, which first appeared in Five Nights at Freddy' 4. Compared to Nightmare Fredear, Nightmare's appearance has hardly changed, the only noticeable difference is the color of the clothing has changed to black, and the bow tie and top hat have changed from purple to yellow. If the image featuring Nightmare is brightened, it will also reveal that Nightmare's outfit is actually translucent, as if his endoskeleton was hidden in shadow. So almost all of his endoskeleton can be seen by brightening his image. The only exception is around his mouth, where an existing material appears to have been torn off. Nightmare is a brutal, twisted animatronic that is essentially sadistic. He spoke in a deep, terrifying voice that fit his name.

Plushtrap, the "Nightmare" variant of Spring Bonnie's plush toy, first appeared in Five Nights at Freddy's 4 as the first antagonist in his own mini-game and didn't appear elsewhere (apart from the Night mini-game). His design is similar to Springtrap but more cartoonish and less damaged. Compared to most other Nightmare animatronics, his appearance also doesn't seem that scary. Brown shading on the belly and a pair of three-jointed ears. He also has four fingers and three toes, which is markedly different from most other nightmare animatronics. Unlike Springtrap, his ears are intact, without any missing fingertips. While much of Plushtrap's character is unknown and uncertain, due to facts such as his lack of a voice, it's clear that he shares the same vicious and aggressive behavior as other nightmare animatronics.

The Nightmare Mangle appears to be similar to the original Mangle, debuting in the Halloween Edition of Five Nights at Freddy's 4 replacing Nightmare Foxy. Of all the Nightmare animatronics, the Nightmare Mangle seems to be in the most disrepair. It has all the original parts of the original Mangle, such as the white plastic head, endoskeleton head, and various mechanical parts, but looks much more sinister and twisted. Its head shape looks similar to Nightmare Foxy's, with the addition of red cheeks and lipstick, while the second endoskeleton head closely resembles a skull. It has only one hand on its right arm. Its eye sockets, chin, muzzle, and the inside of its ears are also pink. Like the original Mangle, it wears a pink bow tie. Not much is known about Nightmare Mangle's character due to the garbled radio static that Nightmare Mangle emits, but from the looks of it, Nightmare Mangle appears to be just as aggressive as other Nightmare animatronics.

Nightmare Balloon Boy is one of the nightmare animatronics in the Five Nights at Freddy's series, debuting in Halloween Update expansion (both Standard and Halloween Edition) for Five Nights at Freddy's 4. The Nightmare Balloon Boy has a similar appearance to the original BB, but with a more menacing design. His large, pointed teeth in his large mouth, as well as his dark blue eyelids and gums, long claw-like fingers, and more sinister eyes with red irises and narrow gray veins, all make him look creepy. He also has a red and purple striped hat and shirt instead of his usual red and blue stripes. The pinwheel on the top of his hat is also blue instead of orange, with a yellow button on top. Two of his buttons are indigo instead of the original BB's black buttons. His brown hair is slightly shorter than his original hair. His blue pants are lighter in color. On closer inspection, the Nightmare Balloon Boy appears to be wearing white socks. His shoes are exactly like his original shoes, although they appear lighter in color. Interestingly, the Nightmare Balloon Boy looks flawless.

William Afton is the founder of Afton Robotics, LLC, responsible for the creation of Funtime Animatronics, and one of the co-founders of Fazbear Entertainment, Inc. William Afton is a serial killer, directly and indirectly, responsible for all events, murders, and tragedies throughout the series. The physical description of his original self is largely unknown, as he has only appeared in human form in a few mini-games. Originally featured in Five Nights at Freddy's 2, he was depicted as an unnamed purple figure, colloquially known as "The Purple Guy". His mouth always seemed to take the form of an elongated sadistic smile. Outside of the mini-game, William is seen as having a cracked jaw. It wasn't until Five Nights at Freddy's 3 that he retained a semi-coherent look, and while it may have been underused, he had expressive eyes and a piece that conveyed his Emotional state of the mouth. Due to supernatural circumstances and his own willpower, he is able to deceive death and return in his new resurrected form no matter how many times he dies. Afton himself was killed due to a mechanical failure in the Spring Bonnie suit he wore during the murder, and has appeared after death in various avatars throughout the series; most notably Springtrap in Five Nights at Freddy's 3, reddy Fazbear's Pizzeria Scraptrap in Simulator, and Burntrap in Five Nights at Freddy's: Security Breach.

Michael Afton, one of the protagonists of the Five Nights at Freddy's series, the eldest son of serial killer William Afton and brother of Elizabeth Afton, made his debut in Five Nights at Freddy's: Sister Location. In the custom night minigame, he is shown to be fairly light-skinned, with dark brown hair that appears to be combed, and blue eyes. He was also wearing a purple long-sleeved shirt, blue pants, and brown shoes. Like his father William, his smile seemed elongated, but looked more friendly and warm, rather than his father's sadistic and disturbing smile. However, it has been speculated that he is a player character in some earlier titles, with several pseudonyms, including "Mike Schmidt" in Five Nights at Freddy's, "Fritz Smith" in Five Nights at Freddy's 2, and "Fritz Smith" in Five Nights at Freddy's 3 Unnamed security guard. His motives are secretive and not very well-known, although he is considered a central figure in the series' overall story.

Crying Child, the protagonist in Five Nights at Freddy's 4 minigames, is traumatized by Fazbear Entertainment's animatronics due to his brother's bullying. He is a little boy with dark brown hair. He was wearing a black shirt with two grey stripes, light blue shorts, and grey shoes. There were usually tears on his face. Crying Child is depicted as a terrified and confused boy. Whenever his brother brutally frightened him, he would cry incessantly. He seems to have a connection to his stuffed animals, as he calls them friends, suggesting he might be lonely. Plush toys are probably the closest thing he has to a companion. It was implied in a later installment that he was Michael Afton. The child was mortally wounded by the Fredbear animatronic, fell into a coma, and died. He has no name in the game and is colloquially known as "Crying Child", but a cryptographic puzzle in the Survival Logbook suggests his name is Evan.

Gregory, the protagonist of Five Nights at Freddy's: Security Breach, who is trapped in the Mega Pizzaplex overnight, and must survive against several hacked mascot characters and automated security robots. Gregory is a skinny child with apricot skin, messy brown hair, and brown eyes. He has bandages on his right cheek and left knee. He was wearing a blue T-shirt with a light blue neckline and two white stripes across his chest. He also wore a white vest under his shirt. He was wearing tan cargo shorts all the way to the knee. For footwear, he wears white socks and white, red and teal sneakers with dark grey soles. He is a grumpy, outspoken kid. Usually, whenever he gets a little pissed off or annoyed, like when he gets a "crappy" or "stupid" item or realizes he still has five hours to live, he makes a public comment to express his anger.

Vanessa, a security guard who appears in Five Nights at Freddy's: Security Breach, is a young woman with pale skin, shoulder-length blonde hair, freckles, green eyes, and smooth lips. At work, she wears a dark grey hat marked "SECURITY" with a white button-down shirt, two small one-piece collar pins, simple black shoulder badges, and a silver police-style badge. Oval patch. This was paired with black oxfords, black slacks, and a belt, and she wore a gold badge on her right hip. Emails from Special Delivery reveal that she once wore a rainbow-striped hair extension, and she was seen wearing purple nail polish. She also loves baking and ordering cupcake recipes and puppies because she allegedly owns a sparkly pink journal with pictures of them. However, Vanessa also looked lonely. Through her therapy records, we learn that Vanessa has been struggling with severe anxiety, depression, and past trauma. Contrary to what she looks like in the game, she appears depressed during therapy and has a self-critical attitude.

Vanny is a follower of the digital virus Glitchtrap, a form of serial killer William Afton, and the main villain in Five Nights at Freddy's: Security Breach. She wore a white bunny suit with stitching and a large pink tartan stitch on her left hip. The costume also features a light blue bow on the chest and pink paw pads under its hands and feet. Her bunny mask features small buck teeth, a pair of long beards, tiny eyebrows and large, glowing red eyes that seem to be parted, and a wide, creepy smile. Under her mask, she was spotted with blonde hair tied up in a ponytail, similar to Vanessa's. In Five Nights at Freddy's: Security Breach, Vanny is shown to hide a sadistic personality behind the boyish glitz. This manifests in her casually, happily jumping behind Gregory as he runs past her, and running over with her arms outstretched if Gregory gets too close.

Phone Guy was an employee who worked for the establishment of Fazbear Entertainment, Inc. While he may be a forced ally, he is the player's only ally. In Five Nights at Freddy's, Phone Guy is a little cold and doesn't explain why. Throughout the game, he does his best to tell the player that "there's really nothing to worry about", despite the obvious danger of being killed by the animatronics. He seemed hesitant and embarrassed at times, often stuttering and laughing nervously, suggesting that he might be worried that someone would hear his warnings and advice about animatronics. Of course, it's also possible that he was generally anxious and nervous because he thought danger to his conscience was imminent. Still, he emphasized giving players survival advice for the first few nights, but also insisted that the restaurant is committed to employee safety and that "there's nothing to worry about," which is clearly not the real protagonist.