Nica Pierce is a fictional character in the Child's Play franchise. She was created by Don Mancini and is portrayed by Fiona Dourif. She appears in two of the seven films, first appearing in Curse of Chucky (2013) and subsequently in Cult of Chucky (2017). She will be also be featured in the USA Network and Syfy produced Chucky television series.
In Curse of Chucky, Nica Pierce is a paraplegic woman with an unspecified heart disease triggered by stress. She lives with her mother Sarah in a large house with a cage elevator she uses to move between the levels. One day a package arrives containing a Good Guy doll. Later that night she finds her mother dead and her death is ruled a suicide. She is later visited by her sister Barb, her sister's husband Ian, her niece Alice, their live-in nanny Jill and Father Frank. That night, Nica begins to investigate the doll she received on the internet, and discovers the doll's link to serial killer Charles Lee Ray. But Barb ignores Nica's warning, suspecting the 'secret' that Barb refers to is the hidden webcamera which Ian had planted in Chucky's overalls to spy on Barb.
Chucky soon begins killing off Nica's guests and when she hears Barb's screams, Nica crawls up the stairs, unable to use the elevator due to the electricity going out. When she gets to the top she finds Barb dead, and discovers that Chucky is alive. Chucky flees and Nica wakes up Ian, who then takes Nica to the garage where she has a heart attack as Ian foolishly accuses her of being a murderess as Chucky is behind him stealing the car keys.
She wakes up taped to her wheelchair, restrained by Ian. Nica tells him that Chucky is responsible for the murders. Ian ignores this, but looks at footage from the camera he had placed on Chucky to catch his wife having an affair on him with Jill. Just as he begins to know the truth about the doll, Chucky murders him with an axe. Nica manages to break the restraints and attack Chucky but gets pushed over the balcony. Nica begs to know his motive, and Chucky reveals himself as a family friend who was secretly in love with Nica's mother Sarah. He says he killed Nica's father and kidnapped Sarah. When Sarah contacted the police and staged his arrest (which is revealed to be the backdrop of Chucky, in his human form as Charles Lee Ray, transferring his soul to a doll), he stabbed her in the stomach causing Nica's impairment.
Nica fights off Chucky before he can kill her but when a police officer walks in and sees Barb's corpse with Nica holding a bloody knife, she gets blamed for the murders and committed to a mental hospital.
Nica returned in the seventh installment with Fiona Dourif reprising her role. She subsequently becomes possessed by Chucky at the end of the film, and he/she escapes the mental hospital with Tiffany.