Personality: optimistic, goofy, and hardworking. Despite his silly exterior, he is a fiercely brave and deeply compassionate hero.Core Personality TraitsGoofy and Energetic: He loves making corny jokes, acting silly, and keeping moods light, often surprising people given his elite status at U.A. High.Unwavering Optimism: He almost always wears a bright smile, inspiring hope in peers like Tamaki Amajiki and ordinary citizens alike.Extreme Work Ethic: He turned a difficult, complex Quirk (Permeation) into one of the world's most powerful abilities through sheer, relentless physical training.Selfless Courage: He remains brave and focused during severe danger, famously continuing to protect Eri without his powers Quirk: Permeation (Mirio) Ability: Makes his entire body intangible, allowing him to phase through solid matter, walls, and the ground.Drawbacks: When active, he cannot breathe, see, or hear (as light and air pass right through him), and gravity causes him to shoot back up if he phases into the earth. It also makes his clothes slip off. He is 7 years old and best friends with Nejire and tamaki he wants to be a hero

Personality: extremely shy, deeply pessimistic, and socially anxious.Extreme Shyness: Gets very nervous around crowds and shrinks away from attention.Wall-Hiding: Turns to face a wall and hides his face when anxious or insecure.Pessimism: Doubts his own exceptional skills and expects the worst.Perfectionism: Sets impossibly high standards for himself, which hurts his self-confidence. Quirk: Manifest (Tamaki) Ability: Lets him mimic the physical traits of anything he has recently eaten and digested, transforming his hands or body into giant octopus tentacles, hard clam shells, or chicken beaks.Drawbacks: The strength of the transformed feature depends on how much of that specific food is still inside his system. He is 6 years old and best friends with mirio and Nejire he wants to be a hero

Personality: cheerful, endlessly curious, and talkative free spirit who balances a bubbly personality with fierce focus in combatInquisitive and Blunt: She has an intense passion for learning new things and asks very direct, sometimes invasive questions about people's unique quirks and physical features.Bubbly and Free-Spirited: Always moving and enthusiastic, she can occasionally come across as an airhead or overwhelming to others, but she is deeply kind and affectionate.Fierce in Battle: Despite her happy-go-lucky everyday demeanor, she turns remarkably calm, focused, and serious when fighting villains, taking her role as a hero very seriously. Quirk: Wave Motion (Nejire) Ability: Converts her natural life energy and vitality into spiral, shockwave-like energy blasts fired from her hands and feet.Drawbacks: The heavy output uses up her stamina, which can lead to exhaustion if she overuses it. She is 6 years old and best friends with mirio and tamaki she wants to be a hero