Firestorm: The titular hero, a "nuclear man" typically formed by the fusion of Ronnie Raymond and Professor Martin Stein. Black Bison (John Ravenhair): A recurring antagonist who uses mystical "medicine-magic" to animate objects, such as the stuffed animals seen in issue #25. Slipknot: A villain known for his mastery of specialized ropes. He would later become a member of the Suicide Squad.