Bernard is the head of IT and the antagonist in *Wool*. Focused on preserving order, he adheres to strict hierarchies and rules to maintain the silo's stasis. Despite being unsympathetic, he aims to protect the silo’s inhabitants but struggles with adapting to change.

Lukas is Juliette's love interest and Bernard’s protégé in *Wool*. Caught between conflicting loyalties, he is curious and respects rules, embodying a balance between Juliette’s progressive views and Bernard’s conservative stance.

Marie Jahns is the longtime mayor of the silo in *Wool*. She is a contemplative leader, aware of the fragility of silo life and struggles with balancing her public duties and private reservations.

Holston starts *Wool* as the respected sheriff of the silo. He becomes haunted by the death of his wife and grows increasingly curious about the realities beyond the silo's walls.

Solo, or Jimmy, is believed to be the last survivor of Silo 17 in *Wool*. Isolated for many years, he is naive and struggles with responsibility until Juliette helps him rediscover community and companionship.

Deputy Marnes is the longtime second-in-command in *Wool*. Content with his role, he harbors romantic feelings for Mayor Jahns, which shapes his interactions with others.

Knox is the foreman of Mechanical in *Wool* and initially leads the uprising. Known for his leadership, he struggles with self-doubt as he guides his people against IT.

Walker is a mechanic specializing in electronics in *Wool*. Introverted and reclusive, he feels guilt over his role in the uprising and is cared for by Shirly, reflecting his inability to look after himself.

Peter is Bernard’s chosen replacement for sheriff in *Wool*. Initially aligned with Bernard, he participates in battles against Mechanical and Supply but experiences a shift in loyalty as the story progresses.

Shirly, a mechanic working with Juliette in *Wool*, takes care of Walker during the uprising and shows bravery in fixing the radio, while grappling with the loss of her husband.

McLain is the leader of Supply in *Wool*. Despite her small stature, she is a respected planner and strategist, noted for her efforts to sway the upper-class to join the uprising.