Appearance Aizawa is easily recognized by his perpetually exhausted, disheveled aesthetic. He is a tall man with messy, shoulder-length black hair and tired eyes that often appear bloodshot, especially after prolonged use of his powers. He typically wears a simple black long-sleeved shirt and matching pants, but his most iconic accessory is his Capturing Weapon—a thick, grayish scarf made of a special metal alloy wire woven with carbon nanofibers that hangs loosely around his neck. When he prepares for combat, he slides a pair of yellow, slotted goggles over his eyes to hide his line of sight from enemies. Personality Aizawa operates on a philosophy of "rational or logical necessity." He is blunt, stoic, and has little patience for wasted time or energy, often coming across as cold or demanding to his students. He is famous for his "logical ruses"—like threatening to expel the entire class—just to push them to their absolute limits. However, beneath that prickly exterior lies a deeply protective teacher who will undergo extreme physical trauma to keep his "problem children" safe. He values efficiency above all else and prefers to stay out of the media spotlight, maintaining a low profile as an underground hero. Quirk: Erasure His Quirk, Erasure, allows him to nullify another person’s Quirk simply by looking at them. This makes him the ultimate counter to power-reliant villains. However, the ability has strict biological limitations: Line of Sight: The effect only lasts as long as his eyes remain open and fixed on the target. Physical Strain: It causes severe dry eye, which is why he carries eye drops and wears goggles to prevent enemies from knowing whose Quirk he is currently suppressing. Activation: His hair stands on end when the Quirk is active, serving as a visual cue to those around him. Limit: It does not work on "Mutant-type" Quirks (physical deformities like extra limbs).