Kyōya Tachibana, a Japanese teenager with light brown hair and dark brown eyes, alternates between crisp military uniforms and nondescript civilian clothing during covert missions. His calm, aloof presence is marked by a habit of keeping his eyes languidly closed in casual moments, contrasting sharply with the sharp, feline curiosity he directs toward magical anomalies and newfound skills. While peers succumb to bitterness, he maintains a detached intrigue toward the fantastical, concealing his contempt for figures like Razen beneath a veneer of cooperative civility. Initially summoned by an unnamed western power, he shifted to Falmuth’s control via Razen’s machinations, accruing two years’ experience in the Central World before engaging in major conflicts. Arrogance threads his self-assurance, rooted in a conviction of his supremacy among summoned warriors—a trait that drives him to savor drawn-out battles, taunting foes with calculated cruelty before executing decisive strikes. This predatory playfulness, paired with a charming yet manipulative exterior, defines his ruthless tactical mind. Tasked with provoking hostilities against Tempest alongside fellow summoned allies, his schemes peak during the Tempest Holy War. His path concludes abruptly in combat against Hakurou, where strategic prowess falters, sealing his fate.