Devil Zeus originates as Super Devil, supreme ruler of Tenmakai (Demon World) within the Bikkuriman universe. He reigns as the Akuma faction's recurring antagonist, locked in eternal conflict with his primary rival, Super Zeus, champion of the Tenshi (Angels). His background establishes him as a powerful entity commanding the demonic realm.

Across the series' continuity, the character undergoes significant evolution. Approximately ten years before the events of Super Bikkuriman, Super Devil clashes decisively with Super Zeus. During this pivotal battle, he successfully seizes a portion of his rival's divine power. This acquisition triggers a metamorphosis, forging a new hybrid identity known as Devil Zeus. This evolution signifies a substantial increase in his capabilities.

Following this transformation, the character exists in a dual state. Throughout the Super Bikkuriman narrative, he is referenced interchangeably by his original designation, Super Devil, and his evolved identity, Devil Zeus. This dual nomenclature reflects his merged nature, wielding both his inherent demonic might and the stolen divine energy of Super Zeus. His actions and motivations during this period are fueled by this merged power and his enduring opposition to the angelic forces.