Shota Aizawa, also known as the Erasure Hero: Eraser Head, is a Pro Hero and the homeroom teacher of U.A. High School's Class 1-A. Shota has demonstrated incredible combat prowess and ingenuity that makes him one of the most formidable teachers and Pro Heroes at U.A. High. Shota's usual battle tactic consists of canceling an opponent's Quirk and then using his Capturing Weapon in conjunction with his high agility to easily defeat or restrain his adversaries. Even without the aid of his Quirk, Shota relies on his proficiency in hand-to-hand combat, excelling in close quarters combat. His overall abilities make him a pivotal combatant in situations that involve his opponents being solely Quirk-reliant, and with the Erasure Hero creating openings by negating their powers in the midst of battle, him and his comrades are put into advantageous positions.
During the U.S.J. Incident, he effectively held his own against low-tier members of the League of Villains that surrounded and outnumbered the Erasure Hero, dozens to one. Shota evaded multiple attacks from opponents of various sizes and abilities before restraining them and sending them flying with calculated counter attacks. He was even able to nearly defeat Tomura Shigaraki, a highly capable villain before the U.S.J. Nomu intervened and overpowered the Erasure Hero. Other than Tomura, Shota can effectively fend off high-level villains such as Vanguard Action Squad members, Dabi and Himiko Toga, albeit with some difficulty. He also played vital roles during the Shie Hassaikai Raid and the Paranormal Liberation War, both of which involved large teams of heroes contending with high-class villains, with the latter spectacle involving the suppression of various High-End Nomus and Tomura's enhanced abilities. Erasure is Shota's Quirk gives him the ability to nullify another person's Quirk by looking at the user. The effects of this Quirk can still last even if Shota's line of vision is out of range. After sustaining grievous injuries at the U.S.J., Shota can't use his Quirk for as long and must rest longer between erasures. After losing one of his eyes in the Paranormal Liberation War, he has now almost completely lost the ability to use his Quirk. While powerful, this ability has many drawbacks: Erasure deactivates if Shota blinks. His Quirk gives Shota a bad dry eye, forcing him to blink more often when he uses the power continuously. Most Mutant-class Quirks are immune to Erasure. Erasure makes Shota's hair stand on end while it is active, allowing his enemies to see when his Quirk is active or not. This Quirk has no offensive potential. The Quirk Factor lies within Shota's eyes, so if one or both are damaged or destroyed, he cannot effectively use Erasure.