Shota Aizawa, known as the Pro Hero Eraser Head, serves as the homeroom teacher for Class 1-A at U.A. High School. He has a tall, slender frame, pale skin, messy shoulder-length black hair, and perpetually tired, half-opened black eyes, often appearing unkempt with facial stubble. His standard outfit includes a black long-sleeved shirt, matching pants tucked into boots, a utility belt, and his signature capture scarf. He conceals yellow goggles beneath the scarf for combat. Significant physical changes result from injuries: a scar forms under his right eye after the U.S.J. incident. During the Paranormal Liberation War, he loses his right eye, requiring an eyepatch, and undergoes amputation of his right leg to halt the spread of a Quirk-destroying drug, later utilizing a prosthetic limb. Post-war, his hair becomes shorter and parts to the right. Aizawa exhibits a stern, logical, and reserved personality, holding high expectations for his students. He employs "logical ruses" – deceptive tactics designed to push students toward their potential. Historically, he expelled underperforming students only to re-enroll them later, though he has not expelled any Class 1-A members. Despite an apathetic demeanor, he deeply cares for his students' safety and development, demonstrated by actions like shielding Tsuyu Asui from Tomura Shigaraki while critically injured. His backstory involves formative trauma. As a U.A. student, he befriended Hizashi Yamada (Present Mic) and Oboro Shirakumo. Oboro's death during a villain attack profoundly impacted Aizawa, increasing his solitude and fueling a commitment to anti-villain combat. He later discovered Oboro's corpse was used to create the Nomu Kurogiri, intensifying his grief and motivating his strict teaching philosophy to prevent similar student deaths. Aizawa's Quirk, Erasure, nullifies others' Quirks through eye contact, deactivating if he blinks or loses line of sight. Drawbacks include severe dry eye, managed with eye drops, and ineffectiveness against Mutation-type Quirks. He wields a capture weapon made of steel wire and carbon nanofibers, mastered over six years, for mobility and combat. His fighting style emphasizes agility, hand-to-hand proficiency, and tactical analysis, allowing him to counter Quirk-resistant foes. As a teacher, he prioritizes real-world hero preparedness, often criticizing U.A.'s examination systems as insufficiently challenging. His relationships with colleagues vary: he shares a longstanding camaraderie with Hizashi, who coined his hero name; initially clashes with All Might over teaching methods but later reaches mutual respect; and maintains a professional rivalry with Vlad King. Key student dynamics include: * Initially doubting Izuku Midoriya's potential but gradually acknowledging his growth, particularly during the war when Midoriya defended him. * Recognizing Katsuki Bakugo's talent despite his volatility, affirming his heroic integrity publicly and expressing pride in his development. * Guiding Shoto Todoroki toward teamwork and showing concern during his family crises. * Encouraging Ochaco Uraraka's resilience and critiquing her performance constructively. Post-war, Aizawa semi-retires from active hero work to focus on teaching. He becomes the guardian of Eri, a girl with a dangerous Rewind Quirk, utilizing his Erasure to contain her power if necessary. He also mentors Hitoshi Shinso, training him in capture techniques and gifting him a modified capture scarf.