Chica

Chica is a major antagonist in the Five Nights at Freddy's franchise. Chica is an animatronic chicken and children's entertainer housed at Freddy Fazbear's Pizza, along with Freddy Fazbear and Bonnie. She is the backup singer standing on the right-side in Freddy's band. At midnight, she is supposedly left in a "free-roaming mode" until 6 AM, to prevent her servos from locking up.

Along with the other animatronics, Chica will try to forcefully stuff any human she sees after hours into a Freddy Fazbear suit, resulting in death. Like the other classic animatronics Chica is haunted she was once a little girl named Susie who was murdered at the pizzeria and she now haunts Chica looking for revenge against her murderer William Afton.

Classic Chica
Chica is a bright yellow animatronic chicken with a spherically-shaped head, orange beak, magenta eyes, and black eyebrows. On the top of her head are three "tufts" of feathers. She has two talons from each of her orange feet. She wears a white bib that reads "LET'S EAT!!!" in yellow bubble letters, outlined in purple and the bib is flecked with tricolored triangles in patterns of three, and what appear to be tiny stylized pizza slices.

Like all of the other animatronics at Freddy's, she has an out-of-place set of blocky teeth sticking up from her lower beak. Her endoskeleton teeth can also be seen within the back of her mouth, though these are only clearly visible in certain angles.

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 (except Foxy and Golden Freddy), has black eyelids.

First appearing in the first game, the Cupcake later makes numerous appearances in other games, and rarely jumpscares. Only being seen in Help Wanted, and the cupcake's nightmare counterpart in Five Nights at Freddy's 4.

Withered Chica
Her older, withered form, Withered Chica, first appears in Five Nights at Freddy's 2, then later returns in Ultimate Custom Night and Five Nights at Freddy's VR: Help Wanted as an antagonist. She, along with the four other older animatronics have all fallen into severe disrepair and she is replaced by her newer counterpart (Toy Chica) for the "improved" Freddy Fazbear's Pizza due to going through an attempted retrofit and subsequent abandonment of the older model, in favor of Toy Chica, according to Phone Guy on Night 2. For a start, the feminine features have been toned down, and she appears more androgynous as a result, to contrast her more with Toy Chica. Her body seems to have minimal changes. Her beak has a jaw similar to the ones Withered Bonnie and Withered Freddy have, which appears to be completely unhinged. Her beak is also more pointed, like that of an actual chicken, and she has even more teeth on her upper and lower beak. The infamous second set of teeth from the animatronic endoskeleton is also clearly visible and covered in blood. She has two stumps where her hands used to be, with long wires pouring forth.

Personality
Based on the Freddy Fazbear's Pizza Theme Song song, Chica is a pushy, gluttonous but lovable singing animatronic bot who has love for food, especially pizza. The Pizza Party level in Night Terrors also demonstrates this by actively eating pizza from a room that appears to be the kitchen, and in the first game, one can hear clanging sounds emanating from the kitchen. In both occasions, she was distracted by her goal of killing the player, implying that her gluttony can distract her at times. According to HandUnit's instructions in "Parts and Service: Chica", she still maintains her gluttonous tendencies as she is covered in pizza.

Chica also seems to be very pushy and determined, as when she gets to the night guard's door, she will stay there for long periods of time far longer than Bonnie would.

As Withered Chica, in Ultimate Custom Night, she seems to be a contemptuous survivor, feeling strangely aware of the fact that she is damaged. Her voice has a lot of ominous buzzing and fan-like noises in the background. One of her voice lines heavily imply that she was the first murdered victim from the Missing Children Incident.

Functionality
In Help Wanted, she has technology similar to the funtime animatronics, although her mechanical inside parts are not seen, and she has a beak that can pop open immediately like most funtime animatronics at the push of two buttons.