Commander Jürgens leads the Gishin invasion forces, hailing from the environmentally collapsing planet Gishin. He operates under strict orders to secure Earth as a new homeworld for his species.

A commander of exceptional strategic skill and unwavering loyalty, Jürgens employs calculatingly ruthless leadership focused solely on mission success. He commands the colossal fortress ship Noah and directs powerful combat units against Earth's defenses. Jürgens views Earth's inhabitants solely as obstacles to his people's survival, driven by a profound sense of duty and belief in the righteousness of the Gishin cause.

The arrival of the higher-ranking Lord Zell introduces political pressure and scrutiny over Jürgens' command. Zell criticizes Jürgens' tactics and perceived failures, ultimately maneuvering to seize direct control of the invasion.

This usurpation forces Jürgens into open defiance. Recognizing Zell's methods as potentially catastrophic and dishonorable, Jürgens chooses direct opposition. This culminates in a personal confrontation aboard Noah where Lord Zell defeats and kills him.

Jürgens' arc depicts his evolution from an unquestioningly obedient military commander to a figure who rebels against his own chain of command when faced with a threat to his people's ideals and survival, embodied by Zell. His death creates a power vacuum, altering the conflict's leadership structure.