Jō Itsutsubashi and his twin brother Gin serve as Shinkalion pilots within the West Japan Command Office’s Kyoto Branch, hailing from Yamaguchi Prefecture. The siblings display near-indistinguishable personalities, so aligned in behavior that few distinctions exist beyond their shared fervor for ichthyology. Both possess the uncanny ability to identify wild-caught versus farm-raised fish, openly favoring the former—a preference that sparks spirited debates during meals or discussions involving aquatic life.

Their combat approach hinges on unconventional, improvisational tactics, a method that initially clashed with teammate Takatora Kirishima’s strategies. This friction delayed the Shinkalion Trinity’s formation until Hayato Hayasugi mediated, reconciling their differences. Post-resolution, the twins adapted to collaborative missions, frequently aiding Takatora in procuring quality fish for culinary ventures.

Assigned to the Kyoto Branch, Jō operates the Shinkalion 700 Nozomi. The pair’s mirrored mannerisms and identical interests permeate their duties, where they prove dependable in coordinated operations. Their service extends to joint missions with other divisions, including critical defense operations against extraterrestrial forces during the Shinkalion ALFA-X prototype deployment, showcasing their adaptability in high-stakes scenarios.