Beckett is a 41-year-old ghostwriter living in Charlotte, North Carolina. Raised in the college town of Wyatt Valley by professor parents, she possesses deep knowledge of the campus and its hidden steam tunnels. She carries immense guilt over a deadly fire that occurred during her senior year. Intensely protective, she readily drops everything to investigate when she suspects her daughter is in danger.

Delilah is an 18-year-old college freshman and theater student attending Wyatt College on a full scholarship. Seeking independence from her mother's watchful eye, she adapts to the social environment of her new school on her own terms. She is resourceful and resilient, though her desire for privacy creates friction with her mother.

Adalyn is Beckett's former college roommate and best friend. As a wealthy legacy student, she possesses a dramatic personality that contrasts with Beckett's more cautious nature. Her confrontational choices during their college years ignite a deadly chain of events.

Trevor is an art history professional working at a museum in Washington, DC. He met Beckett during her time studying abroad in London. Though he and Beckett are no longer together, he maintains a steady presence in Delilah's life and drives to Wyatt Valley to support Beckett when Delilah's safety is questioned.

Violet is an affluent resident of the exclusive Estates neighborhood in Wyatt Valley, married to a powerful developer. She attended high school a few years ahead of Beckett. Polished and polite, she maintains a pristine image while closely monitoring her sons.

Bryce is a 19-year-old student at Wyatt College. He is the son of Violet Wharton and stepson of Joseph Wharton. Navigating the campus environment, his actions frequently draw the watchful eye of Beckett, who suspects him of holding secrets about the ongoing campus unrest.

Cliff is the associate dean of students at Wyatt College, having worked his way up from manual labor. He was Beckett's non-serious romantic partner during high school. Balancing his professional duties with his personal life as a father, he acts as a conflicted bridge between the town locals and the elite college administration.

Doc is Beckett's mother and a former psychology professor at Wyatt College. Highly perceptive, she views relationships critically and maintains a sharp watch over her family's reputation. She shares a deep connection to the academic world that defines her lifestyle.

Hal is Beckett's father, a former anthropology professor who managed the school's archives. He collects valuable antiques and possesses an intimate knowledge of the campus's hidden infrastructure, including possessing a skeleton key to the old steam tunnels.

Charlie is a young, working-class local man from twenty years ago. His tense encounter with Adalyn over a game of darts, and her subsequent vandalism of his new Ford truck, sparks a bitter rivalry that culminates during the school's traditional campus run.

Micah is a local resident and Charlie's close friend. He participates in the confrontation with Adalyn and Beckett, backing up Charlie when the dispute over dart game bets escalates into intimidation.

Mayhew is a local detective who first encountered Beckett twenty years ago as a young police officer investigating the tragic campus fire. He harbors lingering suspicions about the Bowery family and maintains a watchful, scrutinizing presence whenever trouble arises in Wyatt Valley.

Sierra is a local resident who works at the town's cash-only deli. She befriends Delilah and assists in searching the local quarry for her when she goes missing during a campus lockdown.

Joseph is a powerful local developer who runs JW Enterprises. He presents a hunched posture that contrasts with his stepson's height. His company controls significant local properties, including the old town quarry.

Joey is the younger son of Violet and Joseph Wharton. He lives in the affluent Estates neighborhood with his family and is closely monitored by his mother.

Beverly is a talkative neighbor of the Bowery family in Wyatt Valley. She pays close attention to local happenings and readily shares gossip and historical details about the town's properties with anyone who asks.

Dill is Beverly's son who works the night security patrol at the Wyatt College campus. His position gives him access to campus areas and information regarding student movements after dark.