The intelligent new kid who skipped a grade and discovered the entrance to Bennett Delamere’s bomb shelter, strengthening his bond with the group through his bright ideas and observations.

Initially resentful of Ricky, Evan comes to value his insight while grappling with his own challenging family circumstances and seeking comfort in the fort community.

Mitchell struggles with OCD and financial hardships after his mother loses her insurance, often contributing to group dynamics with his particular quirks.

Caught in the middle of his parents' contentious divorce, Jason tries to maintain his relationship with his girlfriend while managing the split loyalties between her and the fort secrets.

The assertive seventh-grade girlfriend of Jason and the daughter of a policeman, she becomes a helpful asset to the group after learning of their secret.

A high school dropout often seen causing trouble around town, Jaeger forms a problematic influence over Luke in the unfolding storyline.

Evan's older brother, grappling with the feelings of abandonment, who becomes entangled with Jaeger's schemes while facing his own challenges.

A towering figure with a history in wrestling and a violent temper, Marcus is C.J.'s stepfather and has a deceptive public persona.

C.J.'s mother, who struggles with denial over her family's issues, trying to find a better life for her son amidst difficult circumstances.

The psychiatrist who treated Mitchell for OCD, known for his cherished herb garden, and plays a role in Mitchell's efforts to address his condition.