Sam’s twin brother and primary antagonist, Caine is a charismatic leader with telekinesis, driven by a lust for control and power.

Known as "Astrid the Genius," she is Sam’s trusted advisor, providing logic and scientific inquiry to navigate the dangers of the FAYZ.

Referred to as "The Healer," Lana has the ability to mend injuries and grapples with the community's demands and her traumatic past.

Caine’s sadistic lieutenant, known for his love of violence and a tentacle arm mutation, serving as an enforcer of terror.

A pragmatic figure who becomes an economic leader, establishing a new currency system to organize labor and resources in the FAYZ.

Caine’s strategist and confidante, using her intellect to navigate alliances and protect her interests in a volatile environment.

Leads the “Human Crew” and promotes prejudice against the super-powered children, exploiting societal fears and tensions.

Astrid’s brother with autism, who holds immense, secret power as the creator of the FAYZ barrier, connected to unexplained phenomena.

Sam’s former best friend who struggles with courage and seeks redemption by finding a valuable role within the community.

Caretaker of the youngest children in the FAYZ, known as “Mother Mary,” who conceals personal struggles behind her nurturing facade.

A sixth grader whose power to alter his own density forces him into reluctant self-discovery and moral decisions.

A mutant with superspeed abilities, known as "The Breeze," loyal to Sam and driven by a desire for vengeance against their enemies.

Possesses the power to nullify gravity in a targeted area, acting as a stoic and reliable protector among Sam’s allies.

A technological genius whose loyalty is divided between Sam and Caine, driven by the challenge of his technical work.

A boy with heat generation powers whose accidental actions escalate tensions between “normals” and mutants in the FAYZ.

A boy undergoing a physical mutation into gravel-like substance, possessing strength and invulnerability under Howard’s management.

A mutant with camouflage abilities, serving as a spy and infiltrator, motivated primarily by food and fear.

Sam’s reliable ally and military leader, providing steadfast support and a grounded perspective on their survival struggles.