Subaru Azuma commands the Shinkansen Ultra Evolution Institute’s General Command Office as chief commander, directing strategic operations and unifying regional branches against threats ranging from the Kitoralsus to subsequent extraterrestrial incursions. His leadership prioritizes cohesion and cutting-edge technology, balancing crisis management with tactical innovation. Tasked with sanctioning high-stakes missions, he greenlights experimental deployments such as the advanced Shinkalion ALFA-X unit when conventional strategies falter.

Six months after resolving the Kitoralsus conflict, he confronts an alien invasion by integrating a temporally displaced younger Hokuto Hayasugi into the ALFA-X pilot team, exploiting time anomalies to counter extraterrestrial forces. This calculated maneuver highlights his adaptability in repurposing extraordinary assets under duress.

A Suica IC card mascot-inspired penguin accompanies him, symbolizing Japan’s railway heritage woven into the narrative. The character’s role remains strictly defined by operational duties, with no disclosed personal history or evolution beyond these parameters.