Tetsutetsu Tetsutetsu, hero name "Real Steel," is a U.A. High Class 1-B student who earned his Hero Course spot by placing 8th in the entrance exam. His *Steel* Quirk morphs his body into durable metal, amplifying strength and resilience, but hinges on iron consumption—low levels cause fatigue and brittleness. Overuse degrades his metallic state, and though resistant to temperature extremes, prolonged heat can melt his exterior. Magnetism also exploits this weakness. Born October 16 in Saitama Prefecture, he graduated from Anshio Middle School before U.A. His distinct look includes gray chin-length hair, sharply slanted black eyes, and jagged teeth. His costume features a dark green jumpsuit with steel reinforcements, a jaw guard branded with "Fe" (iron’s periodic symbol), and armored plating. Post-graduation, he sports shorter hair. Hotblooded yet fiercely loyal, Tetsutetsu clashes competitively with Class 1-A’s Eijiro Kirishima due to their akin Quirks. Their U.A. Sports Festival duel ends in a draw, though iron deficiency later costs him an arm-wrestling rematch. Rivalry evolves into mutual respect, leading them to intern under Fourth Kind and Fat Gum. Determined to showcase Class 1-B’s merit, he challenges adversaries like Shoto Todoroki in the Joint Training Battle, enduring scorching flames and ice by pushing his Quirk’s endurance. Critical milestones include intercepting a bullet to shield Itsuka Kendo during the Forest Training Camp and partnering with Pony Tsunotori to execute the *Horn Dash Hammer*, merging her horn projectiles with his steel form. His strategic acumen surfaces when deducing Mustard’s youth during the Vanguard Squad invasion and countering Shoto’s Quirk limits. Eight years post-Final War, he ranks as the No. 26 Pro Hero, underscoring his relentless growth. Combat-wise, he employs brute-force tactics, absorbing blows with his steel body before retaliating. Ultimate Moves like the concussive *Steel Fist* and the superheated strike *Heatetsu* capitalize on his thermal resistance. A spinach-rich diet sustains his iron reserves, vital for his Quirk. Despite his impulsiveness, his unwavering resolve to protect others and surpass his limits cements his identity as a resilient, altruistic hero.