Big Gold, an alien entity born from a wish-granting machine crafted by an ancient civilization, embodies "Desire." She emerged alongside Iczer-1, her counterpart representing "Conscience," after the Cthulhu matriarch (also named Cthuwulf) sought salvation for her dying race. Exploiting this desperate wish, Big Gold twisted their fate, transforming the Cthulhu into a militaristic empire under her command. She enslaved their leader, renaming her Sir Violet, and redirected her ambitions toward conquering Earth.

To achieve dominion, Big Gold deploys parasitic vedims to mutate and replace humans, unleashing global chaos. She engineers Iczer-2 as a rival to Iczer-1, but the plan unravels due to Iczer-2’s hubris and Iczer-1’s tenacity. Her tactics extend beyond physical warfare; she weaponizes psychological torment, manipulating Nagisa’s trauma by orchestrating her parents’ murder to fracture Nagisa’s bond with Iczer-1.

Her legacy endures through successors like Neos Gold, her "daughter" in *Iczer Reborn*, who assaults Earth to cement her inherited dominance, exploiting human shields against Iczer-1 and Iczer-3. In *Iczer Girl Iczelion*, her androids Cross and Chaos execute planetary annihilation, mirroring her ruthless strategies.

During her final confrontation, Big Gold meets her demise when Iczer-1 absorbs her power, fusing with Nagisa’s spirit to restore Earth and erase memories of the invasion. Yet her essence lingers through her creations and progeny. Defined by unrelenting ambition, she weaponizes desires and fears to dominate, leaving no room for remorse or redemption across her enduring influence.