Ryu Hijikata serves as a senior Earth Defense Force officer, spearheading strategic operations during critical conflicts. He first leads the experimental warship *Andromeda* in Saturn’s defense against the Gatlantis invasion, his tactical decisions proving vital to Earth’s survival. When Comet Empire forces cripple the *Andromeda* during a patrol engagement, Hijikata is evacuated by the *Yamato* crew and ascends to command the legendary battleship.

As *Yamato*’s captain, he directs counterattacks against the Comet Empire’s relentless push toward Earth, orchestrating defensive maneuvers to stall their advance. During the climactic confrontation with Emperor Zwordar’s armada, Hijikata falls in combat while shielding the *Yamato* from annihilation. His death coincides with the near-total devastation of Earth’s fleet, compelling the *Yamato* to launch a desperate infiltration into the enemy’s core.

Hijikata’s lineage traces to the Shinsengumi’s Hijikata Toshizo, echoing a legacy of disciplined service. His unwavering commitment to duty defines his leadership, with his transfer from the *Andromeda* to the *Yamato* underscoring the fluid chain of command amid escalating warfare.