Terror of Mechagodzilla

A reclusive mad scientist whose quest to destroy mankind drives the crisis. He manipulates Titanosaurus and Mechagodzilla 2, proving ruthlessly calculating and power-hungry. His plans unravel as Interpol closes in and Katsura resists his control.

Mafune's daughter, injured and turned into a cyborg after an experiment. She is torn between loyalty to her father and her own feelings for Ichinose, complicating the human stakes of the monster war. Her actions are pivotal in disabling the control device at the film's climax.

Marine biologist who assists Interpol and uncovers Titanosaurus's vulnerability. His affection for Katsura creates a personal conflict as he leaks information to aid their side. He embodies curiosity and moral choices under pressure.

A giant marine dinosaur unleashed by Mafune, its ferocious power and vulnerability to sonic waves create a crucial battle in Yokosuka. The creature forces rapid military response and demonstrates the unpredictable scope of Mafune's experiments.

The iconic guardian of Earth who returns to defend Japan from the Titanosaurus and Mechagodzilla threats. His presence shifts battles and offers a glimmer of hope against overwhelming metallized foes.

An advanced robotic kaiju developed to replace the original Mechagodzilla, controlled by the Simeons through Katsura's device. Its victory conditions hinge on human intervention and forceful defense.

Simeon supreme leader orchestrating the plan to exterminate mankind through a monster alliance. His calculated moves bring the human–alien conflict to a fever pitch before being thwarted.

The steady Interpol leader coordinating a multinational response, including biologists and agents, to capture Mafune and neutralize the monsters. He drives critical rescue operations and escapes.

A professor who contributes technical insight to the Interpol team and Titanosaurus investigation, helping connect scientific clues to Mafune's experiments.