Shōta Aizawa, the Pro Hero Eraser Head, embodies reserved sternness and pragmatic dedication to heroism and education, forged through personal loss and professional discipline. His youth and career at U.A. High School defined pivotal bonds, including friendships with Hizashi Yamada (Present Mic) and Oboro Shirakumo. Shirakumo’s mentorship helped Aizawa embrace his Quirk’s potential, but his death during a mission—crushed while shielding civilians—reshaped Aizawa’s path. The tragedy steered him toward underground heroism, marked by solitary resolve and anti-villain specialization. Decades later, learning of Shirakumo’s corpse being repurposed into the Nomu Kurogiri reignited his anguish, spurring a vengeful confrontation with the responsible scientist. Tall and lean with disheveled black hair and weary eyes, Aizawa’s appearance reflects his austere lifestyle. His hero costume—a black jumpsuit, utility belt, and carbon-nanofiber capture weapon—prioritizes function. Years of combat left visible scars: deep facial marks, a prosthetic right leg from a self-amputation to halt Quirk destruction, and an eyepatch concealing a right eye lost battling Tomura Shigaraki. His Quirk, Erasure, nullifies emitter and transformation-type abilities via eye contact, disabled by blinking or visual obstruction. Chronic dry eye from overuse necessitates eyedrops, while his combat prowess blends martial skill, agility, and strategic mastery of his capture weapon, honed over six years. Notable battles include enduring the U.S.J. assault despite critical injuries, the Shie Hassaikai Raid, and the Paranormal Liberation War. As Class 1-A’s homeroom teacher, he employs harsh tactics like expulsion threats—termed “logical ruses”—to galvanize student growth. Beneath his stern facade lies unwavering commitment to their safety, repeatedly risking his life to shield them. This protectiveness extends to Eri, a girl he safeguards after her rescue from experimentation, using Erasure to stabilize her volatile Quirk. Trusted allies include Present Mic and Midnight, though clashing philosophies initially strained his rapport with All Might. Their dynamic shifted to mutual respect post-All Might’s retirement. Aizawa’s mentorship evolves from detached authority to recognizing students as equals, culminating in the Final War Arc where he fights alongside them as peers. Spin-offs like *Vigilantes* delve into his early career, tracing his transition from a self-doubting student to a resolute mentor. These stories reveal his investigative rigor and the origins of his strict teaching ethos, rooted in preventing Shirakumo’s fate by prioritizing survival over reckless sacrifice. Recurring themes of leadership burdens, vigilance’s toll, and quiet devotion underscore his legacy. His impact lies not in fame but in shaping future heroes through resilience and unspoken care, embodying heroism as a steadfast, unsung commitment.