Gorgo is an albino Gorgosaurus who rules a pack of carnivorous dinosaurs and is widely known as the "white devil." She commands her territory like a crime boss or warlord, a domain strewn with the bones of fallen rivals and victims.

She is responsible for the genocide of multiple dinosaur populations, having completely destroyed a flock of Pteranodons and ambushed a herd of horned Tyrannosaurs. The eradication of the Pteranodons left her as the last of her kind. She targeted the horned Tyrannosaurs after perceiving them as a major threat, and only a single member of that herd survived.

Her primary motivation is territorial conquest and the slaughter of inhabitants, not merely for food but because she can. This drive led her to seize the Pteranodon valley and fuels her relentless pursuit of a fabled "Herbivore's Paradise," which she intends to massacre.

Throughout their journey, the protagonists Punon and Tyrano pursue her. Upon discovering their destination, Gorgo immediately commands her minions to find this paradise.

In the climax, she and her pack assault the Herbivore's Paradise. Her final confrontation takes place against Tyrano within the heart of a newly active volcano, where flowing lava surrounds them. Defeated in battle, Gorgo meets her end when Tyrano makes a heroic sacrifice, dragging them both into a pool of lava.