Joe's daughter, who becomes central to the conflict as she navigates the psychological challenges stemming from her father's secretive work.

The primary antagonist, who evolves from a dehumanized object within the facility to a powerful entity seeking revenge against Joe.

The lead physician at the facility, who contrasts with Joe by advocating for humane treatment of the Antennas and maintaining ethical standards.

Individuals who have lost their identities and autonomy, reduced to living surveillance tools, embodying the novel’s exploration of dehumanization.

An investigator from the Company headquarters, representing the impersonal bureaucracy focused on the Antenna program's objectives rather than moral considerations.

Joe’s ex-wife and Riley’s mother, whose tragic experience with hallucinations prompted by the Antennas sets up the story’s central conflict.

The head of security at the facility, known for his loyalty to Joe and competence, who becomes unwittingly involved in the Antennas' plans.

Control room operators providing insights into the facility's daily operations, whose actions become pivotal during the story’s climax.