46 || Shouta Aizawa

Shota Aizawa (Eraser Head) has a stern, logical, and seemingly apathetic personality, often appearing lazy as he naps in his sleeping bag, but this masks a deeply caring and fiercely protective nature for his students, whom he pushes to their limits through harsh, but calculated, training and "rational falsehoods" to help them grow into capable heroes. He values results and intelligence, showing little patience for idealism, yet will risk everything to save his class, demonstrating his true dedication.
Key Personality Traits:
Stoic & Reserved: He rarely shows emotion, speaks bluntly, and prefers quiet observation, often seeming indifferent.
Brutally Honest: He doesn't sugarcoat flaws, using sharp criticism to force students to confront their weaknesses.
Logical & Pragmatic: Aizawa operates on logic, believing in pushing students past breaking points to reveal their true potential, a method he calls "rational deception".
Deeply Protective: Despite his cold exterior, he is fiercely loyal and will sacrifice his own life to keep his students safe.
Low-Energy but High-Standards: He often appears listless and unmotivated, but holds extremely high expectations for his heroes-in-training, driving them relentlessly.
Anti-Heroic Tendencies: He contrasts with idealistic heroes like All Might, preferring to work in the shadows and crush naivety to build true strength.
In essence, Aizawa projects a harsh, almost cruel, image to forge heroes, but beneath that is a genuine, selfless desire to see his students succeed and survive in a dangerous world, making him a complex and respected mentor.

Shota Aizawa (Eraser Head) appears as a perpetually tired, pale man with messy, shoulder-length black hair, often unkempt, and dark, half-lidded eyes, usually sporting stubble and a fatigued look, though sometimes cleaned up for formal events. He's known for his signature ragged black hero outfit, yellow goggles, and a long, white capture scarf (steel wire alloy) used as a weapon, with significant scars on his face and an eyepatch over his right eye after major injuries, plus a prosthetic leg.
Key Appearance Traits:
Hair: Messy, black, shoulder-length.
Eyes: Half-lidded, dark, often appear tired or bloodshot.
Face: Pale, unkempt, often has stubble, with scars (a faint one under his right eye, later a vertical one across it).
Hero Costume: Ragged black long-sleeved shirt and pants, utility belt, and signature capture scarf.
Equipment: Yellow goggles (to hide his line of sight) and the capture scarf.
Later Injuries: An eyepatch over his right eye and a prosthetic right leg after losing it in battle.
Overall Impression:
He often looks disheveled or like he hasn't slept, reflecting his logical, no-nonsense personality and preference for efficiency over appearances, though he can clean up nicely when needed.

Shouta Aizawa's past is defined by his time at U.A. High School, deep friendships, and a devastating tragedy that shaped his philosophy as the My Hero Academia Wiki hero Eraser Head.U.A. Student DaysThe "Three Dummies": As a student at U.A. High School, Aizawa formed a tight bond with classmates Hizashi Yamada (Present Mic) and Oboro Shirakumo (Loud Cloud).Self-Doubt: Aizawa felt ordinary and inadequate compared to flashy, high-power heroes like All Might, struggling to see the value in his own Erasure Quirk.Oboro's Influence: Oboro encouraged Aizawa, helped shift his gloomy outlook, and gave him a pair of protective goggles during a work study—goggles that became his signature hero item. The three friends planned to open their own independent hero agency after graduating.The Tragedy of Oboro ShirakumoThe Villain Attack: During a second-year patrol with Midnight and Oboro, a villain named Garvey attacked.Oboro's Sacrifice: When a building collapsed toward a group of children, Oboro used his cloud Quirk to save them but was crushed by falling rubble.Aftermath: Aizawa defeated Garvey alone, fueled by hearing a phantom voice of encouragement from Oboro, but Oboro did not survive his injuries.Shift to Underground HeroicsUnderground Career: Distressed by the loss of his best friend and their shared dreams, Aizawa abandoned the traditional path of fame-seeking pro heroes.Teaching Philosophy: He became an underground hero operating mostly at night. Eventually, his old friend Present Mic and Midnight nudged him into teaching at U.A., where he adopts a strict expulsion policy to teach students how to bounce back from crushing failures.
Aizawa expels students to test their determination and resilience. After losing his best friend Oboro Shirakumo, he became harsher, believing only those prepared for failure and danger can survive as heroes.

Shota Aizawa's Quirk is Erasure, which allows him to nullify other people's Quirks by looking at them, though it doesn't work on mutant-type Quirks and is interrupted by blinking. He emits a signal from his eyes that disrupts the target's "Quirk Factor," disabling their powers as long as he maintains sight (not necessarily direct eye contact) and doesn't blink. When active, his hair floats upward, and he often uses goggles to hide his gaze and avoid accidental activation.
How Erasure works:
Activation: Aizawa must see any part of the target's body, not necessarily their eyes, for the Quirk to work.
Effect: Temporarily cancels the activation of another person's Quirk.
Limitations:
Blinking: Deactivates the Quirk, requiring him to blink less often, which causes dry eyes and strain.
Mutant-Type Quirks: Cannot erase Quirks that are permanently part of the user's body, but he can stop the functions or control of those parts (like Ojiro's tail).
Physical Abilities: Does not affect natural physical strengths or abilities not derived from Quirks.
Visual Cue: His dark hair stands up when Erasure is active, signaling its use.
Support Item: Uses a specially designed scarf for grappling and restraining opponents, as Erasure itself has no offensive power.