Sam is a fourteen-year-old student residing in Perdido Beach. After everyone aged fifteen and older suddenly disappears, the panicked remaining children push him into a leadership role due to his past heroism during a school bus accident. He harbors a secret ability to shoot burning light from his palms, a power he fears using because he accidentally burned his stepfather's hand a year ago.

Astrid is a fourteen-year-old certified genius who takes university-level classes. Rational and highly intelligent, she immediately begins formulating theories about the strange, impenetrable barrier surrounding their town. She assumes full responsibility for her autistic younger brother while supporting Sam in his emergent leadership role.

Lana is a fourteen-year-old girl who was sent to live with her grandfather on his ranch after getting into trouble at home. Trapped alone in the harsh desert following the mass disappearance, she sustains life-threatening injuries and fights to survive. She discovers she possesses a unique supernatural ability to heal physical wounds with her touch.

Caine is a charismatic, well-spoken student from Coates Academy who quickly establishes himself as a leader in the adult-less world. He delivers reassuring speeches and implements strict laws to bring order to the chaotic town. Behind his authoritative exterior, he possesses powerful telekinetic abilities and a ruthless desire to maintain absolute control over the youth zone.

Quinn is a teenage surfer and Sam's closest companion. He struggles to process the sudden disappearance of the adults and his parents, reacting with high emotion and questioning if the event is a divine punishment. He relies heavily on Sam for stability but also wrestles with feelings of inadequacy and jealousy in their shifting world.

Pete is Astrid's four-year-old brother, who is on the autism spectrum. He requires constant supervision and does not fully comprehend the dangerous changes happening around him. He possesses a powerful ability to teleport people and objects, though he uses it instinctually when triggered by negative emotions or hunger rather than by conscious choice.

Drake is a sadistic student from Coates Academy who acts as Caine's primary enforcer. He arms himself with firearms and takes immense pleasure in intimidating and physically harming other children. Operating with a high degree of autonomy under Caine's regime, he enforces the new laws through pure terror and brute force.

Diana is an observant student from Coates Academy who acts as a critical informant for Caine. She has the ability to read the power levels of other individuals, categorizing their strength into numerical "bars." She uses her position close to Caine for protection while maintaining her own cold, calculating independence.

Computer Jack is a twelve-year-old technology enthusiast from Coates Academy. He attempts to remain useful to Caine's regime by restoring phone lines and tracking surveillance data on his tablet. He quietly harbors his own supernatural strength, terrified that revealing it will place him in danger from the aggressive enforcers around him.

Mary is a responsible teenager who takes charge of the town's youngest, most vulnerable children. Dubbed "Mother Mary" by the community, she fights fiercely to secure diapers, food, and reliable babysitters from the town's older kids. The immense pressure of keeping the infants alive triggers a relapse of her bulimia.

Albert is a hardworking boy who independently assumes responsibility for the town's food supply. Having grown up doing daily chores for his large family, he comfortably takes on a managerial role, rationing out meals and researching long-term agricultural plans. He firmly believes that physical work is the only way their new society will survive.

Edilio is a brave new student in Perdido Beach who quickly proves himself to be an indispensable ally to Sam. He operates heavy machinery like a backhoe to test the town's mysterious barrier and provides practical, grounded assistance. Unafraid to confront bullies, he becomes a vital tactical asset in organizing the town's defense.

Orc is a local bully who exploits the chaotic disappearance of the adults to seize neighborhood control. Armed with stolen bats and accompanied by his gang, he rules his immediate territory through physical intimidation. He views himself as the rightful enforcer of the town until Caine arrives and subordinates him.

Howard acts as the mouthpiece and primary sidekick for Orc's gang. He frequently mocks Sam and other students, demanding tributes and enforcing Orc's crude territorial tolls. He lacks physical courage on his own but acts highly aggressively when backed by stronger allies.

Bette is a young classmate who discovers she has the harmless ability to make her hands glow brightly. Her innocent use of this power violates the town's new authoritarian laws, resulting in a brutal physical punishment that serves as a grim warning to the rest of the children.

Dahra steps into the overwhelming role of town doctor despite having zero medical training. She relies exclusively on medical textbooks to diagnose ailments ranging from stomachaches to severe head trauma. She struggles deeply with the terrifying responsibility of holding the remaining children's lives in her hands.

Elwood is Dahra's boyfriend who assists her in operating the abandoned town hospital. He supports Dahra as they attempt to care for injured and sick children, providing essential backup in a severely under-resourced and highly stressful medical facility.

Patrick is Lana's loyal yellow Labrador retriever. He survives the severe vehicle crash in the desert and remains steadfastly by her side, guarding her from wild mountain lions and coyotes while she is incapacitated. He serves as Lana's only trusted companion and protector in the wilderness.

Connie is Sam's mother, a nurse whose mysterious encrypted journals hint that she knew about the supernatural occurrences prior to the disappearances. She vanished along with the other adults, leaving Sam to piece together the secrets she kept about his past and the local children.

John is Mary's younger brother who assists her in the exhausting task of running the town's makeshift orphanage. Alongside other young volunteers, he tries to soothe the panicked infants and toddlers who continually cry for their missing parents.

Dekka is a student who escapes the authoritarian regime at Coates Academy to seek safety in Perdido Beach. She possesses the supernatural ability to suspend gravity in localized areas, making her a formidable tactical addition to Sam's defensive efforts during the escalating town conflict.

Brianna, also known as "The Breeze," is an eleven-year-old girl who discovers she has the power of supernatural speed. Despite her young age, she acts as a rapid scout and messenger, navigating the dangerous town streets to relay critical information between defensive positions.

Pack Leader is a massive, unnaturally intelligent coyote who has gained the ability to speak. He commands a large pack of mutated desert predators and follows the directives of a mysterious, dark force hiding in the mines, actively hunting human survivors.