Mirio Togata, hero name Lemillion, stands as a beacon of resilience and hope in his world, celebrated for his unmatched combat prowess, unshakable optimism, and unwavering dedication to heroics. Born with the Quirk Permeation, granting him the ability to phase through solid matter, Mirio endured grueling trials to master a power that initially hindered more than helped. Intangibility robbed him of sight, sound, and breath, while frequent miscalculations left him embarrassingly unclothed—a problem later solved by a hero costume woven from fibers derived from his own hair, allowing it to phase seamlessly with him. Early academic struggles gave way to meteoric growth under Sir Nighteye’s tutelage, propelling Mirio to lead U.A. High’s elite Big Three alongside Tamaki Amajiki and Nejire Hado. His combat mastery hinges on explosive mobility, leveraging controlled bursts of Permeation to rocket through terrain, paired with surgical strikes like the Phantom Menace—a technique harnessing his Quirk’s repulsive force to overwhelm foes. The Shie Hassaikai Raid tested Mirio’s resolve when he shielded Eri, a child tormented for her Rewind Quirk, from the yakuza overlord Overhaul. Severely wounded and stripped of his Quirk by a destabilizing bullet, he fought quirkless, guarding Eri until aid arrived—a sacrifice cementing his ethos that heroism transcends power. Though offered One For All by Izuku Midoriya, Mirio declined, placing faith in Eri’s latent ability to undo his loss. Her eventual control of Rewind resurrected Permeation during the Paranormal Liberation War, where Mirio’s resurgence turned tides against Near High-End Nomus and Tomura Shigaraki’s forces. In the Final War, his tactical brilliance orchestrated battlefield communications and defenses against Shigaraki’s onslaught. Mirio’s indomitable spirit shines through his mantra: “A world without smiles and humor has no bright future.” This philosophy, inherited from All Might, fuels his vow to save one million lives—the heart of his hero name. His bond with Eri reflects this compassion, mentoring her toward confidence and Quirk mastery with patient encouragement. Eight years post-graduation, Mirio claimed the title of No. 1 Pro Hero, a testament to ingenuity forged through adversity. His journey—marked by Quirk loss and revival, Nighteye’s guidance, and relentless devotion to others—etches a legacy where perseverance and heart eclipse raw power, proving true heroism lies in the courage to rise, unbroken, after every fall.