Lynnette is a hyper-vigilant survivor of the Silent Night Slayings. She lives in a caged apartment and designs her life strictly around avoiding danger, relying heavily on a houseplant named Fine for emotional grounding. Haunted by the deaths of her family and boyfriend, she struggles with severe anxiety and the persistent belief that she is not a true survivor because she played dead rather than fighting back.

Dani is a tough, self-sufficient survivor of the Babysitter Murders, an attack perpetrated by her older brother. She lives on a remote ranch and approaches the world with a no-nonsense, pragmatic attitude. She values law, order, and physical readiness, though her tough exterior softens around her dying wife, Michelle.

Julia is a highly educated wheelchair user who survived attacks from both her high school and college boyfriends. She operates with a scholarly and activist mindset, though she has faced significant personal misfortune, including a manipulative marriage to her physiotherapist that cost her the rights to her story.

Marilyn is a wealthy Texas socialite who survived an encounter with the cannibalistic Hansen family as a teenager. Married to a prominent politician and prison-owner, she uses her resources and polished manners to insulate herself from danger. She favors an escapist approach to her trauma, preferring to focus on her luxurious present rather than the past.

Heather is a scrappy, argumentative survivor of a supernatural massacre. She lives in a halfway house and struggles with drug addiction, which contributes to her marginalized status even within the group. Because her trauma involves supernatural elements, the public largely doubts her story, causing her to lash out defensively at others, especially Lynnette.

Adrienne is the maternal figure of the Final Girls, having survived a massacre at Camp Red Lake and defeated the killer Bruce Volker. She utilized her settlement money to create a foundation for survivors of violence. She is widely considered the best-adjusted of the group, dedicating her life to helping others and acting as a protective mentor to Lynnette.

Dr. Carol is a compassionate psychologist who runs the Final Girl support group and authored a book about their experiences. She provides a safe space for the women to process their trauma and regularly goes out of her way to offer shelter and medical guidance when crises arise. She balances her demanding professional life with raising her two sons.

Stephanie is a sixteen-year-old girl recently thrust into the public eye as the newest "Final Girl." She survived a traumatic ordeal involving her tennis coach before facing a devastating massacre at Camp Red Lake. Her sudden emergence on the news immediately draws the concern of the support group members, who understand the lifelong trauma she is facing.

Chrissy survived a homecoming massacre but has since developed a disturbing philosophy that glorifies trauma and killers. She deals in "murderabilia," buying and selling macabre artifacts related to the women's tragedies. Her museum-like woodland home and open alignment with attackers make her an outcast among the Final Girls.

Garrett is the law enforcement officer who saved Lynnette during the Silent Night Slayings and subsequent attacks. He served as her protector and media liaison during her recovery, establishing a complex, dependent dynamic built on his authority and her desperation for safety.

Skye is Dr. Carol's twenty-something son who still lives at home. He possesses a strong understanding of computers and technology. When Lynnette arrives at his house, he exhibits an intense, somewhat uncomfortable curiosity about her physical scars and traumatic history.

Pax is Dr. Carol's chaotic eight-year-old son. He is energetic, largely unsupervised in his behavior, and occupies his time by drawing violent comic books. He shows little understanding of boundaries when interacting with his mother's traumatized patients.

Michelle is Dani's terminally ill wife. She is dying of cancer and resides primarily in hospice care. Her rapidly declining health is the catalyst for Dani's decision to step away from the support group to focus entirely on their remaining time together.

Russell is a journalist investigating the lives of the Final Girls. He uses questionable, invasive tactics to dig up information about the group, seeking to capitalize on the public's endless fascination with their tragedies for a book project.

Ricky is the perpetrator of the Silent Night Slayings. A former foster care child and childhood pen-pal of Lynnette, he arrived at her home on Christmas Eve dressed as Santa Claus, brutally murdering her family and boyfriend.

Billy is Ricky Walker's brother. Driven by vengeance over Ricky's death, Billy tracked down Lynnette at her foster home, launching a copycat attack in a Santa suit that nearly killed her.

Keith lives with Chrissy in her secluded home. He exhibits openly violent tendencies that Chrissy encourages as part of her twisted philosophy regarding killers, acting as the physical enforcer of her macabre lifestyle.

Tommy was Lynnette's high school boyfriend. He was visiting her house on Christmas Eve when Ricky Walker arrived, making him one of the first victims of the massacre.

Gillian was Lynnette's younger sister, who was murdered by Ricky Walker during the Christmas Eve massacre while Lynnette played dead to survive.