The primary antagonist and ruler of Newcago with invincibility and a host of powerful abilities. Known for his oppressive governance, his existence defines the conflict at the heart of the story.

A member of the Reckoners and David's romantic interest, known for her professionalism and excellent marksmanship. Her complex attitude toward Steelheart creates tension within the group.

The enigmatic leader of the Reckoners who serves as both a mentor to David and a driving force behind the team's mission. His past and motivations are shrouded in mystery.

The Reckoners' heavy weaponry expert who balances his intimidating physical presence with a calm and hopeful demeanor. His beliefs shape the team's philosophical outlook.

The Reckoners' researcher, responsible for technological operations and providing logical perspective within the team. Her candid commentary often provides levity and clarity.

The Reckoners' sniper known for his laid-back and humorous demeanor, often relieving tension with his eccentric stories. Despite his lightheartedness, he holds a serious commitment to their cause.

An Epic allied with Steelheart, possessing incorporeal powers and control over darkness. He plays a critical role in maintaining Steelheart's control over Newcago.

An Epic known for generating Newcago's power supply and gifting his abilities. Initial perceptions of his role in Steelheart's regime are challenged by revelations about his true situation.