Katsuki Bakugo possesses a complex personality shaped by his Quirk "Explosion," which enables him to detonate nitroglycerin-like sweat from his palms. Raised in a competitive environment that forged his aggressive demeanor, his early academic and physical prowess spurred constant praise, nurturing a superiority complex. This mindset drove him to bully Quirkless childhood friend Izuku Midoriya, mockingly dubbing him "Deku" to assert dominance. His initial years at U.A. High showcased a combative streak and resistance to teamwork, prioritizing victory over collaboration. Combat excellence contrasted with failures—low rescue points in the entrance exam and guilt-induced disqualification during the Provisional Hero License Exam—revealing underlying emotional vulnerabilities. Pivotal moments included his kidnapping by the League of Villains, where he defiantly rejected their recruitment, and battles prompting introspection. His rivalry with Izuku gradually transformed into mutual respect, particularly after learning of One For All’s secrets and confronting tensions in a cathartic duel. Growth crystallized during the Paranormal Liberation War when he risked his life to shield Izuku from Tomura Shigaraki, awakening a new explosive technique. This selfless act signaled a departure from earlier self-centered motives. Later, in the Dark Deku Arc, he offered a raw apology, confessing jealousy of Izuku’s innate heroism and admitting personal insecurities—a vulnerable moment underscoring maturity. Physically, Katsuki’s appearance mirrored his journey. Hero costume updates included streamlined grenade bracers and winter variants optimizing sweat production. Battle injuries etched lasting scars, like a stitched cheek and a temporarily immobilized arm, later rehabilitated. Post-graduation, he rose as a top-ranked Pro Hero under the alias "Dynamight," funding support gear for Izuku. Non-manga media expanded his portrayal: *Heroes Rising* highlighted cooperative dynamics with classmates, while OVAs like *Training of the Dead* and *Hero League Baseball* demonstrated tactical adaptability in unconventional missions. These reinforced his competitive drive and incremental embrace of teamwork, retaining his trademark abrasiveness. Katsuki’s personality merges arrogance with perceptiveness and relentless ambition. He dubs peers with derogatory nicknames yet respects opponents like Ochaco Uraraka, never underestimating them during the U.A. Sports Festival. His leadership prioritizes meritocracy, valuing blunt honesty over deceit. Hidden layers emerge through talents in cooking and music. By the story’s end, he reconciles past behavior with newfound humility, balancing fiery intensity with deepened responsibility. His arc from volatile bully to respected hero reflects themes of redemption, self-awareness, and the nuanced essence of strength.