Metal Bat rose from C-Class Rank 223 to S-Class by proving his combat mastery against Demon-level threats, compelling the Hero Association to forge him an unbreakable metal bat after his standard weapons repeatedly shattered. This indestructible tool became synonymous with his identity, enabling his signature style of relentless close-quarters aggression and tenacious endurance. His younger sister Zenko anchors his personal world, frequently pulling him from hero duties for mundane tasks like grocery runs or her piano performances. Their bond critically surfaces during his clash with Garou, where Zenko’s sudden appearance forces him to honor a vow to abstain from violence in her presence—a testament to his unwavering familial loyalty. In the Alien Conquerors Arc, he joined S-Class allies to battle Melzargard, obliterating one of the entity’s regenerative cores. Later, during the Monster Raid Arc, he shielded a VIP from Centipede-class hordes and Rafflesidon before confronting Elder Centipede. Though outclassed by the Dragon-level menace, he endured until Garou’s interference sparked a prolonged duel, showcasing his defining trait: "fighting spirit," which converts sustained damage into escalating strength and pain resistance. Recovering from these injuries, he later escaped confinement via makeshift slingshot to aid the Monster Association assault, collaborating with King to strategically trap Black Sperm clones. Temporarily aligning with the Neo Heroes for Zenko’s enhanced security, he critiqued their methods while leading strike teams against monster rebellions, revealing unexpected leadership beneath his brash exterior. His combat repertoire, including the whirlwind strike "Savage Tornado" and immunity to stagger effects through sheer determination, merges raw force with battlefield ingenuity. This synergy of unyielding resolve, tactical adaptability, and familial devotion solidifies his role as a cornerstone of heroic resilience.