Chica, one of the four main antagonists in Five Nights at Freddy's, is an animatronic chicken and kid entertainer who lives at Freddy Fazbear's Pizzeria with Freddy Fazbear and Bonnie. When the first Freddy Fazbear's Pizza opened in 1983, she was a backup singer. In 1987, both she and the original animatronics were in serious disrepair, and Chica was replaced by the new villain of her "improved" Freddy Fazbear's Pizza, Toy Chica. Chica is a bright yellow animatronic chicken with a spherical head, orange beak, magenta eyes, and black eyebrows. There are three "clusters" of feathers on the top of her head. She has two claws on her orange feet. She wears a white bib with "Let's Eat!!!" yellow bubble letters, outlined in purple, a tri-color triangle dotted with three patterns on the bib, and what appears to be a tiny stylized pizza piece. Mr. Cupcake is an object-like character from a tray carried by Chica with her left hand. It has pink frosting with two large yellow eyes, a yellow-striped birthday candle with a vinyl candle-light, buck teeth, no wrapper, and, like other animatronics, has black eyelids.

Toy Chica is the re-designed counterpart of Chica in the past, first appearing in Five Nights at Freddy's 2. Toy Chica served as a backup singer at the newly renovated 1987 Freddy Fazbear's Pizza. The pizzeria was closed after only a few short weeks, and Toy Chica and other toy animatronics were scrapped due to possible malfunctions. Unlike the original Chica, the toy Chica has a distinctly curved body, rather than the simple round and oval shape of the original Chica. Like the original Chica, the Toy Chica has a bib. However, her bib says "LET'S PARTY!" instead of "LET'S EAT!!!" Toy Chica presents a typical female character. She is an orange-yellow chicken with an orange beak, blue eyes, purple eyelids, long eyelashes, and orange feet. She has a few stray "feathers" on top of her head. Her cheeks are flushed, just like other toy animations, although her face is pink instead of red. Toy Cupcake is Cupcake's toy counterpart, smaller in size, with a different style of birthday candles and blue eyes instead of yellow. It also lacks the teeth of its original counterpart.

Phantom Chica is an illusion of a burned and damaged Chica that first appeared in Five Nights at Freddy's 3. Phantom Chica is basically the same model as Chica in Five Nights at Freddy's, but instead of eyes, she has white, needle-piercing pupils, similar to Springtrap and other Phantoms. She also appears to be charred or burnt, possibly foreshadowing the burning of the attraction. Phantom Chika also seems to keep her mouth open, even when performing her jump scare. Her hands appear to be different from the original opponent; the original opponent had normal fingers, while Phantom Chica's hand looks like a pair of mittens, with the fingers fused together and the thumbs separated. It's easier to notice in her bright images, but it's probably just a result of the striped texture mixing her fingers together.

Nightmare Chica is a Nightmare variant of Chica, a heavily deteriorated and extensively modified version of the original Chica animatronics, which first appeared in Five Nights at Freddy's 4. While the damage to her upper body was relatively minor, the lower body of her suit had been completely severed from her hips. The bottom of her bib tapers, almost completely to pieces. Instead of orange feet, Nightmare Chica's calves are completely painted orange, and her kneecaps appear to be missing. Most of her toes were covered in black paint as if the color had been chipped away. Her beak is also covered with long, sharp teeth with green roots. The Nightmare Cupcakes have been transformed with sharp teeth and appear to be autonomous. Its eyes are orange with glowing white pupils. Its pink frosting is slightly darker in color. The candle holder is light brown with a large vinyl candle.

Jack-O-Chica is a Halloween-themed revamped variant of Nightmare Chica, first appearing in Five Nights at Freddy's 4, where she replaces the original antagonist in the Halloween version. She is also shown to have a vengeful, yet mocking disposition. Her voice is low-pitched and edited with television-like static noises. The first notable difference is that her color scheme is completely orange in the Halloween style. Her complexion was dark golden rather than yellow. In place of her normal endoskeleton eyes, the sockets are very bright orange, much like a jack-o'-lantern. A similar effect appears to have occurred on Jack-O-Chica's entire body, as it can be seen very commonly around her shoulder sockets and drains out of her stomach. Her endoskeleton head is completely absent, while her endoskeleton teeth remain. A large green jack-o-lantern replaces the Cupcakes at Nightmare Chica. Her bib is the only feature that remains the same.

Funtime Chica, the counterpart to the original animatronic Chica, first appeared in Freddy Fazbear's Pizzeria Simulator. Funtime Chica looks similar to Toy Chica. She still has orange calves, pink areas, Chica-like feet, and an orange waist. She has a built-in speaker, just like Funtime Freddy and Funtime Foxy, located in her abdomen. A plate on her pink upper body was missing. Like other funny animatronics, she has five fingers instead of the cartoony four that normal animatronics have. Her fingertips are orange, and she has pink rosy cheeks and eyebrows. Funtime Chica also has purple eyes with long eyelashes and pink lipstick-like markings on the beak. Unlike most other versions of Chica, Funtime Chica is attractive and vain.

Rockstar Chica is another redesigned version of the original Chica, which first appeared in Five Nights at Freddy's 2. Rockstar Chica is an animatronic chicken similar to the design of the original Chica and Withered Chica in the second game. She is yellow like the rest of her age, with pink eyes and blue cheeks, eyelids, and kneecaps. Rockstar Chica also appears to have lipstick on her orange beak, and her bib reads "LET'S ROCK!!!", a reference to the original Chica's bib. She plays a pair of golden maracas with blue and red lines flowing across the instrument. Scott Cawthon describes Rockstar Chica as loud and obnoxious, speaking with a thick Mississippi accent. She is very boisterous, not only a little sarcastic but also likes to try to attack the player characters. Rockstar Chica has also been shown to have a phobia, which is the fear of falling. It turns out that whenever she sees a wet floor sign on the road, she immediately leaves.

Glamrock Chica is Chica's glamrock counterpart and first appeared in Five Nights at Freddy's: Security Breach. Glamrock Chica is a white chicken with blue eyes. Her beak and claws are orange. There are three stray "feathers" on top of her head. Her face was painted to look like makeup, with purple eyelids, purple lipstick, black mascara, and pink eyeshadow applied to her right eye. Like her toy and entertainment buddies, Glamrock Chica's body is noticeably curved, not round like the original. Her body is divided at joints, and her arms and legs are spherical. Similar to the Funtime Animatronics, small panels run all over her body, mainly on her waist and upper arms. Glamrock Chica proved to be deceitful, making false promises to Gregory, such as meeting his parents, offering candy, or trying to comfort him to appear friendly, all in order to get him to say where he was.