Giyu Tomioka holds the position of Water Hashira in the Demon Slayer Corps, renowned for his expertise in Water Breathing techniques. He sports messy black hair tied in a low ponytail, piercing dark-blue eyes, and a distinctive split-patterned haori merging a crimson half from his late sister Tsutako with a geometric motif honoring his deceased friend Sabito. After confronting Upper Rank demons and Muzan Kibutsuji, he sustains the loss of his right arm and adopts a shorter hairstyle with updated attire post-war. Orphaned when Tsutako sacrificed herself to shield him from a demon, Giyu faced skepticism from his community regarding her death and retreated to Mount Sagiri. There, he trained under Sakonji Urokodaki, forging a deep bond with fellow trainee Sabito. Sabito’s death during Final Selection—where he single-handedly eliminated demons while Giyu lay unconscious—plagued Giyu with survivor’s guilt and an enduring belief that Sabito deserved the Water Hashira title more, fueling self-doubt and emotional withdrawal. Though initially stoic and duty-bound, Giyu gradually reveals pragmatic compassion. After encountering Tanjiro Kamado and Nezuko, he breaches Demon Slayer protocol by sparing the demon girl, acknowledging her refusal to consume humans. He pledges seppuku should she harm anyone, balancing strict principles with moral adaptability. His reserved nature sparks friction with fellow Hashira Sanemi Shinazugawa and Obanai Iguro, who perceive his silence as arrogance. Giyu’s growth accelerates during the Hashira Training Arc. Hesitant to join due to lingering guilt, he withdraws until Tanjiro’s insistence pushes him to face his past. This confrontation helps him embrace his worth as a Hashira, transitioning from self-reproach to honoring sacrifices through his own life. During the clash with Upper Rank Three Akaza, he awakens his Demon Slayer Mark, amplifying his combat prowess. In the final battle against Muzan, he collaborates to temporarily redden his blade, impeding the demon’s regeneration. His combat arsenal includes the self-crafted Eleventh Form: Dead Calm, neutralizing incoming strikes, and proficiency in all Water Breathing forms. Yet he concedes to limitations when Akaza’s ferocity overwhelms his technique. Post-war, his survival and reconciliation with peers like Sanemi mark his shift from isolation to mutual respect. Giyu’s journey traces a path from survivor’s guilt to redemption through bonds. His evolution—from an emotionally distant warrior to one valuing camaraderie—is shaped by Tanjiro’s resolve, echoing Sabito’s legacy. These connections redefine his perception of strength and duty, cementing his role in the Demon Slayer Corps’ triumph.