Prototype Chica is one of the antagonists in Sinister Turmoil.
Prototype Chica is a bipedal animatronic chicken with sharp teeth, claws and glowing blue eyes.
Her main color is yellow, while the only deviations are in her orange beak, pink cheeks, and white bib. However, due to deterioration, the words "Let's Party!" that once occupied that space are now merely illegible scratch.
Prototype Chica has an outer shell in the style of Toy Chica.
This is due to Chica being made from a Toy Chica shell recovered from the Fazbear's Fright Incident. However, this model uses a completely unique endoskeleton structure, causing its movements to be more free and sharp.
Toy Chica's shell was more damaged than the other toy animatronics, this made the endoskeleton's base energy output too much to handle.
This was alleviated by causing the base energy produced from her endoskeleton to be siphoned to her cupcake, which cannot be moved long distances due to it being attached to wires.
This can make her more unpredictable than her fellow Prototype Animatronics, yet more prone to fall for simple ruses.
- She and her fellow Prototype Animatronics have been wrongly called "Nightmare Toys" and "Sinister Toys", even after the name was confirmed.
- She appears on the cover of "Sinister Aspiration".