Charisma Devil X emerges as a major antagonist in the narrative's latter half. He secures unwavering loyalty through manipulated devotion, demonstrated by Nox Jr.—a guard unit captain serving him under the belief of a life debt, a conviction forged by implanted false memories. To attain complete resurrection, he sacrifices every subordinate follower. Reborn, he brutally overwhelms the protagonists, driving them to their absolute brink during their clash. His reign halts when the Giant of Light counters with the "G Tiger Tenken" attack, violently reverting him to an unstable, weakened state. Exploiting Takeru’s momentary lapse in vigilance, he then attempts deception: feigning defeat with tears and pretended loss of fighting spirit. His ultimate fate arrives through contact with the Next World Egg, an entity capable of containing evil energy. This interaction transforms him into an infant form, permanently neutralizing his threat.