Hiraga Gennai serves as a guardian of the Mask of Zeguy, a pivotal artifact in thwarting interdimensional domination. A seasoned Time Warrior, he allies with Toshizo Hijikata to journey across historical epochs, shielding the mask from those who covet its power. His duties extend to commanding the *Heavenly Wind*, a sentient airship fueled by a bioengineered organism whose electrified waste doubles as combat ammunition against adversaries.

The vessel’s architecture fuses ancient Japanese poetic motifs with futuristic technology, its organic engine converting biological processes into energy. Byproduct from these systems is weaponized into crackling projectiles, deployed against foes ranging from cybernetic werewolf bikers to biomechanical hybrids. As both pilot and strategist, Gennai maneuvers this fusion of magic and steampunk machinery through multidimensional battles, balancing tactical ingenuity with the ship’s unorthodox defenses.

His no-nonsense demeanor surfaces in exchanges with allies like Miki, a teen swept into the conflict, as he prioritizes battlefield efficacy over aesthetic concerns. Collaborating closely with Hijikata, he orchestrates counterstrikes and rescues against forces commanded by Himiko, a rival seeking the mask’s dimensional powers. Their partnership thrives on calculated trust, each relying on the other’s strengths to outmaneuver threats.

Gennai’s involvement is documented solely within the two-episode OVA narrative, with no elaboration on his past, motivations, or activities beyond these recorded events.