Katsuki Bakugō trains as a hero at U.A. High School, distinguished by his potent Quirk and layered personal journey. His childhood alongside Izuku Midoriya began with charisma and bravery but shifted after manifesting "Explosion"—a power generating detonations from nitroglycerin-like sweat. This ability fostered a superiority complex, driving him to bully the Quirkless Izuku with the mocking nickname "Deku" ("useless"). Bakugō misinterpreted Izuku’s persistent admiration, like an offer of help after a fall, as condescension, feeding resentment that stemmed from unconsciously recognizing Izuku’s heroic spirit. His arrogance peaked in adolescence when he destroyed Izuku’s hero notebook and forbade him from applying to U.A. High. After the Sludge Villain overpowered him, Izuku and All Might intervened, but Bakugō rejected the idea of needing rescue. He aced U.A.’s entrance exam in combat points yet earned zero rescue points, prioritizing victory over altruism. Enrolled in Class 1-A, his confrontational tactics sparked clashes with peers like Tenya Ida and Shōto Todoroki. Early tests, including a Battle Trial against Izuku and Ochaco Uraraka, exposed his refusal to collaborate and fixation on defeating Izuku, whom he accused of concealing his Quirk. A pivotal shift followed his kidnapping by the League of Villains, who aimed to weaponize his fury. Bakugō spurned their offer, upholding All Might’s ideal of triumph. All Might’s retirement during his rescue plunged him into guilt, believing he caused the hero’s downfall. This trauma contributed to failing the Provisional Hero License Exam, where he ignored rescue protocols. Later, realizing Izuku inherited All Might’s Quirk, One For All, he demanded a cathartic battle, voicing his envy and confusion over Izuku’s selection. Reassured by All Might, Bakugō pledged to surpass Izuku, forging their rivalry anew. Growth emerged through U.A. experiences: interning under Best Jeanist refined his intimidating appearance, though his abrasive edge persisted. Strategic brilliance surfaced in events like the U.A. Sports Festival, where he fought Uraraka with full respect. He embraced teamwork during the Remedial Course, advising a child against arrogance: "If you keep looking down on everyone, you won’t notice your own weaknesses." The Paranormal Liberation War became a turning point. Bakugō intercepted Tomura Shigaraki’s attack on Izuku, suffering near-fatal wounds. Later, confronting the self-exiling Izuku in the "Dark Deku" arc, he tearfully apologized, confessing childhood bullying arose from insecurity toward Izuku’s selfless courage. He validated Izuku’s worthiness of One For All, revealing profound vulnerability. In the Final War against All For One and Shigaraki, Bakugō died shielding allies from a chest wound before Edgeshot revived him. Fighting relentlessly despite grave injuries, he deployed Strafe Panzer cannons to amplify his Quirk, enabling Shigaraki’s defeat but scarring his right arm and face permanently. Post-war, he rehabilitated his arm, graduated U.A., and ranked as the No. 5 Pro Hero "Dynamight"—a polished iteration of "Great Explosion Murder God Dynamight." He funded a support suit for Izuku, securing his rival’s hero career. Physically, Bakugō sports spiky ash-blond hair, sharp red eyes, and a muscular frame. His hero costumes evolved: grenade-themed gauntlets and a black tank top transitioned to winter and stealth variants optimizing sweat production. Post-war, he wore modified gear with a full sleeve covering scars. Adulthood added height, robustness, and braided "fuse-like" hair strands. Personality hinges on competitiveness, volatility, and blunt honesty. He scorns deceit and excels academically, ranking near his class’s apex. Though abrasive—dubbing Denki Kaminari "Dunce Face" and Tenya Ida "Four Eyes"—he respects tenacity, as shown acknowledging Uraraka’s strength. Victory drives him, yet he spurns unearned wins. Over time, loyalty bloomed toward classmates like Eijiro Kirishima, and his dynamic with Izuku evolved from enmity to mutual respect. His hero ethos broadened from combat dominance to valuing rescue, though his fiery core endured.