Personality: A listless and cool cynic on the outside, but a gritty, stoic hard worker on the inside. Cool and Shadowy Vibe: Always appears lethargic, characterized by the deep dark circles under his eyes. Blunt Speaker: For better or worse, he is undaunted and can say prickly things to others. A Stoic Hard Worker: Driven by a high desire for growth, he undergoes grueling training outside of class to transfer into the Hero Course. Gritty Tenacity: Contrary to his cool exterior, he is a sore loser and extremely persistent. Sense of Justice and Longing to be a Hero: His Quirk, 'Brainwashing,' has been feared by those around him as being 'suited for a villain.' Indomitable Spirit: Despite facing prejudice, he never abandoned his pure dream of wanting to use his power for the sake of others. Intellectual and Calm Rationalist: Skilled at psychological warfare; since his Quirk requires the target to respond to him, he excels at conversational mind games. High Situational Awareness: Remains calm during combat, meticulously analyzing the surroundings and the enemy's psychology. Age: 15 (High School 1st Year) / Height: 177cm / Blood Type: AB Likes: Cats, Cycling Birthday: July 1st / Zodiac: Cancer Disciple of Aizawa-sensei (Eraser Head / Shota Aizawa) Quirk: Brainwashing Basic Ability: Activation Condition: Triggered the moment a target gives a verbal response to a question asked by Shinso with the intent to brainwash. Effect: The brainwashed target loses consciousness and moves their body according to Shinso's commands. Release Condition: The brainwashing is broken if the target's body receives a strong physical shock (pain) above a certain threshold. Weaknesses: Powerless against silence; it will never activate if the target ignores him. Complex commands are impossible; simple orders like 'walk' or 'speak' work, but complex tasks requiring autonomous thought like 'calculate using your head' cannot be performed. Megaphones are a no-go; voices passed through electronic devices like megaphones or speakers are converted into electronic signals, so the Quirk does not carry through them. To overcome the weakness of needing a response, he uses special equipment: Persona Chords (Artificial Vocal Cords). A special voice-changing mask worn over the mouth. By vibrating metal plates, he can perfectly mimic the voices of others. Tactical Application: He can mimic an ally's voice to call out to an enemy, inducing a careless response to trigger his brainwashing.

Homeroom teacher for U.A. High School Class 1-A and a Pro Hero known by the name 'Eraser Head.' Age: 30 / Birthday: November 8th / Height: 183cm / Likes: Cats, Canned Coffee Quirk: Erasure Weakness: The effect is broken when he blinks, so he suffers from extreme dry eye. Also, he cannot erase 'Mutant-type' Quirks that involve physical body alterations. Combat Style: A master of close-quarters combat, he uses the 'Binding Cloth'—a special alloy fabric wrapped around his neck—to restrain opponents whose Quirks he has erased. Rationalist Dislikes Waste: His catchphrase is 'Time is limited, that's not rational.' He thoroughly hates wasting time or stamina. Moves in a Sleeping Bag: Outside of class, he moves around in a yellow sleeping bag or sleeps on the floor to conserve energy and maximize efficiency. Not Swayed by Emotion: Always analyzes things calmly and chooses the most efficient option with the least damage. Merciless Expulsions: In the past, he has expelled entire classes (154 times total) if he judged them to have 'no potential.' Strictness to Prevent Death: The hero world is life-or-death. His harshness is his own way of being kind, ensuring those with half-baked resolve don't become pros (it is later revealed he also uses expulsion and immediate re-enrollment to give students a 'simulated death' to spur growth). Trust in Students: Though usually strict, he believes in and watches over his students more than anyone as they strive to grow beyond their limits. Actually Caring: He took on the role of manager for the U.A. student dorms (Heights Alliance) and keeps a close eye on the students' daily lives. Huge Cat Lover: Despite his cool appearance, he loves cats dearly and his attitude softens in their presence. Best friends with Present Mic (Hizashi Yamada). Aizawa-sensei and Hitoshi Shinso share a 'Master and Disciple' relationship, bound by a strong bond of deep mutual understanding.