Bang, also known by his hero name Croc d'Argent, is a recurring character. An 81-year-old martial arts master, he founded the Dojo du Poing destructeur fluctuant. He held the S-Class 3 rank within the Hero Association before retiring. **Background and Early Life** In his youth, Bang was the violent ruffian "Vent Sanglant" (Blood Wind), using lethal Exploding Heart Release Fist for personal enjoyment. He indiscriminately challenged strong opponents, often hospitalizing them, and engaged in womanizing. This behavior created a rift with his older brother Bomb. Their conflict culminated in a duel where Bomb defeated Bang, revealing the emptiness of Bang's path. This loss prompted Bang to seal the Exploding Heart Release Fist and develop the defensive Water Stream Rock Smashing Fist. He established a dojo to teach this art and joined the Hero Association as redemption, seeking to prove his reformation to Bomb. **Appearance and Demeanor** Bang possesses a wiry, muscular physique defying his advanced age, with swept-back white hair, a thick white mustache, gray-blue eyes, and prominent wrinkles. He typically dons a black shirt and gray kimono-style pants with martial arts shoes. His demeanor is generally calm and wise, exemplified by remaining unperturbed facing an impending meteor strike. However, he displays fierce intensity during combat, especially when angered. A recurring mannerism is standing with both arms behind his back. **Personality and Relationships** Bang is deeply respected within the Hero Association for his integrity and experience. He adheres to tradition, valuing his dojo enough to choose potential death over abandoning it. He expresses disappointment in the Association’s deviation from its original ideals. His most significant relationship is with former top disciple Garou, whose descent into monsterhood continually haunts him. Bang blames himself for failing to guide Garou and volunteers to stop him personally, hoping to prevent Garou’s death at other heroes’ hands. This responsibility stems partly from recognizing his own past darkness in Garou. After defeating Garou, Bang retires from hero work to dedicate himself to Garou’s rehabilitation, seeking a fresh start as master and disciple. He acknowledges Saitama’s unparalleled strength, openly stating Saitama surpasses him and all other fighters encountered. He admires Saitama and attempted to recruit him and Genos into his dojo. Despite his wisdom, he occasionally acts contrary to his teachings, such as hoarding food during a shared meal. **Abilities and Combat Style** Bang’s mastery lies in his creation and perfection of the Water Stream Rock Smashing Fist, an ultimate defensive art. It redirects force for automatic evasion during danger, nullifies attacks, and channels energy akin to tidal flows. His analytical prediction enables precise anticipation and countering of opponents’ moves, including pressure point strikes. He retains knowledge of the lethal Exploding Heart Release Fist, which explosively amplifies physical capabilities by synchronizing heart pulses with strikes, but avoids using it. His signature technique, developed with Bomb, is the Roaring Aura Sky Ripping Fist. This combined attack generates internal shockwaves capable of shattering durable defenses like Elder Centipede’s carapace and pulverizing bones. He employs Awakening Breath, a body-control technique forcibly drawing out maximum physical potential for short bursts, significantly enhancing speed and striking power to planetary levels. **Key Battles and Development** During the Alien Conquerors Arc, Bang deflected debris from a destroyed meteor and injured the extraterrestrial Melzargard. In the Monster Association Arc, he subdued a transformed Garou despite enhanced abilities, showcasing superior combat speed and technique. Later, healed by Fubuki and freed from bodily restraints, he defeated Fuhrer Ugly and contributed to battles against Overgrown Rover and Orochi’s components alongside Bomb using their Cross Fang Dragon Slayer Fist. His final confrontation involved clashing evenly with an unconscious Garou utilizing Awakening Breath, cracking Garou’s shell with a finishing blow. These events solidified his decision to retire, concluding his hero career to focus solely on mentoring Garou.