The charismatic leader of the Kevinian Community, who manipulates followers through fabricated theology and maintains control through psychological and physical means.

Minnow's friend and mentor in juvenile detention, known for her fierce intelligence and protective loyalty, who introduces Minnow to new scientific concepts and challenges her beliefs.

An FBI forensic psychologist who mentors Minnow, guiding her to confront her past while helping her build independent thought.

Minnow's first significant connection outside the Kevinian Community, whose relationship with her sparks her journey toward questioning authority.

Minnow’s father, a deacon in the cult who adheres to the Prophet’s authority, even when it leads to harm within his own family.

Minnow’s younger half-sister, who embodies the ideal Kevinian through her absolute devotion and tragic decisions rooted in fanaticism.

Jude’s father, a grief-stricken man whose actions lead to a significant turning point in the story, driven by personal vengeance.