Bang, hero name Silver Fang, ranks as S-Class hero number 3 within the Hero Association. He runs a generational martial arts dojo in City Z. He developed his signature Water Stream Rock Smashing Fist (Puño de Agua Rompedor de Piedras) through rigorous training with his older brother, Bomb, who practices Whirlwind Iron Cutting Fist. Bang earned all his scars perfecting this art and was deemed unstoppable by age 30. He and Bomb frequently trained together, creating powerful combined techniques. Physically, Bang appears elderly, standing 1.65 meters tall and weighing 55 kilograms. He typically walks hunched with hands behind his back, projecting serenity. Despite his 81 years, continuous training maintains his highly defined, athletic physique. His short grey hair sweeps back, and he possesses a prominent white mustache obscuring his mouth and extending nearly to his jawline. His eyes match his grey hair. His casual attire usually consists of a long-sleeved black or light brown shirt, grey elastic-waist sweatpants, and black sandals with white soles. His personality radiates calmness and serenity. He moves without haste, observes analytically, and rarely intervenes in others' actions, believing individuals eventually face consequences. He upholds a strong, honorable ideal of heroism, questioning or reprimanding heroes prioritizing fame over duty, especially higher-ranked ones. He deeply values his family's legacy and the dojo, actively seeking worthy disciples to inherit it after expelling his strongest student, Garou, for violently attacking fellow members. This incident caused most students to leave out of fear, leaving only Charanko. Bang readily acknowledges superior strength in others, like recognizing Saitama's power despite Saitama's lower rank, treating him with respect. His combat abilities are formidable. His self-created Water Stream Rock Smashing Fist enables rapid, powerful blows and force redirection. His physical strength and speed remain exceptional despite his age, with muscular definition becoming more pronounced during intense combat. He demonstrates high durability, surviving a direct hit from the alien Melzargard during the Dark Matter Thieves invasion and emerging unscathed after removing his shirt. Bang first appeared during the Giant Meteor arc. Tasked with stopping a Dragon-level meteor headed for City Z, he deemed it impossible but refused to evacuate, choosing to protect his ancestral dojo. He encountered Genos attempting to destroy the meteor, calming the cyborg before witnessing Saitama obliterate it with one punch. Bang later saved Genos from falling debris. Observing Saitama face public backlash for collateral damage, he reflected on the burdens heroes bear. He later offered to train Saitama and Genos at his dojo, recounting Garou's expulsion after attacking other students. When the Hero Association summoned all S-Class heroes to City-A headquarters due to the alien invasion, Bang battled Melzargard. He exploited the alien's weakness by targeting its regenerative marbles. Though momentarily downed by a surprise attack, he returned shirtless and unharmed, delivering a decisive blow to Melzargard's head, crushing the final marble. The threat from his former student, Garou (the Hero Hunter), became a significant focus. Fearing his own strength insufficient, Bang sought Bomb's help. They arrived too late to confront Garou directly, instead finding defeated heroes like the Tanktop Army and Charanko, who had tried defending the dojo's honor. Later, searching for Garou, Bang and Bomb rescued Class-A hero Smile Man from the monster Fist Fight Djinn. Bang annihilated the monster with a barrage of attacks shattering all its bones before urging Bomb to continue pursuing Garou. His confrontation with Garou occurred during the Monster Association arc. He intervened as Genos prepared to finish off a weakened Garou, expressing disappointment in his former pupil's monstrous state and deciding to end Garou's suffering himself. He engaged Garou one-on-one, overwhelming him with speed and precision, countering moves with Water Stream Rock Smashing Fist. When Garou used Death Gatling as a human shield, Bomb intervened, and the brothers combined their martial arts against Garou. Their finishing move was thwarted when Garou destroyed the ground and swung a large tree. As Bang urged surrender, Phoenix Man and Elder Centipede rescued Garou. Prioritizing civilian safety, Bang and Bomb saved unconscious heroes from debris. Bang, Bomb, and Genos then launched a combined attack, "Whirlwind Water Stream: Roaring Aura Sky Ripping Fist," severely damaging Elder Centipede. However, the monster regenerated and grew stronger. Bang chose to sacrifice himself to allow Bomb and Genos to escape with the rescued heroes, a plan averted when King distracted the creature. His relationship with Bomb is central, rooted in mutual martial arts development and deep trust; their combined techniques are exceptionally powerful. His mentorship of Garou ended tragically with violent expulsion, leaving Bang burdened with regret and responsibility. He acknowledges Saitama's immense strength openly and respects him despite Saitama's lower rank and unconventional behavior.