Roketsu stands as the narrative's primary antagonist, an evil overlord ruling multiple kingdoms and commanding supernatural entities. He possesses supernatural longevity, formidable combat abilities including energy projection, and the power to resurrect by transferring his consciousness into new host bodies. This ability perpetuates his reign across generations as he seizes successors upon physical death. His background features the conquest and subjugation of territories through force and mystical arts, forging a vast dominion. A defining chapter centers on his son Madara, whom Roketsu implanted at birth with artificial prosthetic limbs called "gimmicks." These enhancements aimed to control Madara’s development and potential, molding him into a compliant heir or weapon. This manipulation fuels their conflict when Madara rebels against his father’s tyranny. Roketsu’s motivations spring from an unyielding hunger for absolute power and control, viewing all others—including his son—as instruments to expand his dominion. He orchestrates events with strategic cunning, manipulating political and supernatural forces to crush opposition. During the climactic OVA confrontation, Madara directly challenges Roketsu, wielding a legendary sword and his gimmick-augmented abilities. Their battle concludes when Madara destroys a mystical orb sustaining Roketsu’s life force. This severs Roketsu’s consciousness-transfer ability, causing his permanent demise. His role ends with this final clash, resolving the narrative’s central conflict.