Lord Mask is a supporting antagonist in the anime Our Last Crusade or the Rise of a New World, also known by his true name On Zoa Nebulis. He is the uncle of Princess Kissing Zoa Nebulis IX and a member of the House of Zoa, one of the three royal families of the Nebulis Sovereignty. His background is marked by a traumatic event in his youth: he suffered severe burns from Imperial firearms, which he hides behind a distinctive bird-like mask that he always wears. This mask, combined with his elegant black formal suit and silk hat, gives him the appearance of a refined gentleman, but his true nature is far from gentle. He is an extremist who openly advocates for total war against the Heavenly Empire, and his violent, uncompromising stance drives much of the conflict within the Sovereignty. His motivations stem from a deep-seated hatred of the Empire and a desire to see it destroyed, leading him to pursue aggressive military action rather than diplomacy. In the story, Lord Mask first appears as an antagonist in the second volume of the source material and serves as a major obstacle to the protagonists, working to escalate the war. His role is marked by a secret power struggle: behind the scenes, he is in conflict with the queen and the Lou family, vying for influence and control. His key relationships include his niece Kissing, whom he seeks to manipulate or control for his own ends, and the other members of the Sovereignty’s ruling families, whom he views as rivals or obstacles. As the acting head of the Zoa family, he wields considerable political and military influence. In terms of development, Lord Mask remains a consistent threat throughout the series, his extremist ideology and ambitions driving him to ever more dangerous schemes. His notable abilities include a form of teleportation, which he uses for surprise attacks and to evade enemies. Despite his elegant appearance, he is a ruthless and calculating figure who will stop at nothing to achieve his goal of annihilating the Empire.