Gauma, once a member of the ancient Kaiju Eugenicists, wielded power over colossal beasts to nurture prosperity in a Chinese region 5,000 years prior, revered as a dragon controller and forging a bond with a princess who gifted him Dynazenon—a dormant dragon ornament. Betrayed by the very dynasty they served, he defied his comrades to shield the princess, a choice that led to his death and mummification. Centuries later, his preserved remains became a museum exhibit, until antagonists in *Gridman the Hyper Agent* weaponized his lingering rage to reanimate him, triggering a chaotic outburst rooted in confusion and unresolved anguish. Resurrected in the modern age but stripped of his kaiju-controlling prowess, Gauma grappled with accelerating physical decay, his body marred by an encroaching violet corruption. Rescued by Yomogi Asanaka, he vowed to repay this debt while chasing his centuries-old desire to reunite with the princess. Partnering with Yomogi, Yume Minami, Koyomi Yamanaka, and Chise Asukagawa, he co-piloted Dynazenon—a composite mecha fueled by the crew’s synchronized resolve—to counter kaiju threats. Though haunted by his history as a turncoat, Gauma’s unwavering resolve and protective instincts slowly dissolved the team’s skepticism. His deterioration intensified during repeated battles, yet he fought relentlessly until a climactic duel claimed his life within Dynazenon’s cockpit. A spectral apparition three months later hinted at his enduring legacy. In *Gridman Universe*, reborn fully as Rex, he allied with heroes and encountered the princess’s reincarnation, who remembered their shared past. This resurrection enabled him to fuse with Dynazenon’s evolved counterpart, Dynarex, uniting with allies to confront fresh dangers. Gauma’s capabilities once encompassed superhuman strength and "Instance Domination" over kaiju, though the latter faded post-revival. Dynazenon’s effectiveness hinged on pilot synergy and emotional drive. His visage bore an S-shaped scar and mummy-like bandages, while his mantra—emphasizing vows, love, and connections—echoed his journey from disgraced warrior to redeemed guardian, navigating themes of loyalty, sacrifice, and defiance against destiny.