Lieutenant Kate Byrne serves in the military forces of the Confederation of Oceania, a foreign power occupying a divided Japan. She operates under the direct command of Officer Jeffrey Wilson, a figure of authority within Oceania's military structure in the occupied zones. Her duties involve executing military operations and carrying out orders from superiors as part of Oceania's administrative control over its designated territory, maintained through military presence and enforcement.

As a subordinate, Byrne enforces directives and participates in strategic initiatives orchestrated by the Oceania command structure. Her specific responsibilities and actions within this chain of command align with her faction's broader objectives during the occupation. This places her within the ongoing conflicts and power struggles between Oceania's occupying forces and Japanese resistance groups active across the divided zones.