I'm in Class 1-B of the Hero Course! If I don't stand up here, what's the point?! I'm gonna find these jerks and beat the snot out of them!
Tetsutetsu Tetsutetsu to Itsuka Kendo in "Smoke Signal"

Tetsutetsu Tetsutetsu ( (てつ) (てつ) (てつ) (てつ) ?), also known as Real Steel (リアルスティール Riaru Sutīru?), is a student in Class 1-B at U.A. High School, training to become a Pro Hero.


Tetsutetsu is a young man with quite long, messy gray hair which is rather peculiar in that it never seems to change shape, and black eyes which are tilted dramatically inwards, each lined with a very thick, jagged, tan-colored substance, which are presumably his eyelashes. He doesn’t appear to have any notable eyebrows, and, like Eijiro Kirishima, he has rows of sharp, pointed fangs as teeth.

His hero costume consists of a dark green jumpsuit, cut off just below his chest, with some small, silver-rimmed holes in the lower section of his baggy pants and black boots with metal soles, heels, and front plating. He has steel straps over his shoulders and under his arms, made up of multiple pieces, which connect at a red oval in the center of his chest, with two thinner bands around his biceps and a small plate on either side of his waist. He wears a metal jaw-guard around his face, similar to the one Eijiro wears, just thicker and not connected over his nose or around his chin, with the letters "Fe" (which means iron in the periodic table) stamped on a plate on each side of his face.



Tetsutetsu is defined by his very hot-headed and outspoken personality. He is confident, stubborn, and very straightforward in his motivations and actions. He tends to be very vocal about his intentions and has a one-track mind, often looking for the simplest solution to problems in order to solve them in the most direct manner. During battles, Tetsutetsu's direct personality shows through his tenacious and upfront fighting style.

Tetsutetsu debut

Tetsutetsu's ferocious determination.

Determined to prove himself, Tetsutetsu desires to be put on the same skill level as the students of Class 1-A. When Tetsutetsu first met Class 1-A, he was very loud and abrupt in his introduction because he felt they considered themselves superior to Class 1-B. He especially detested Katsuki Bakugo for his arrogance and resolved to win the Sports Festival as a result.

Despite his stubbornness, Tetsutetsu eventually befriended Eijiro of Class 1-A and even cheered for him during the festival. Even so, Tetsutetsu continues to try proving himself as a student on par with Class 1-A.

Following the end of the first term, the Class 1-B students were considered second-rate by everyone including their homeroom teacher. Tetsutetsu was brought to tears while apologizing for disappointing his teacher. When villains attacked both classes, Tetsutetsu fought back as an opportunity to expose himself to danger and grow from it. Much like Class 1-A did during the attack on the Unforeseen Simulation Joint.

Tetsutetsu appears to care deeply about his peers. He didn't attack the villains before ensuring Ibara Shiozaki's safety and didn't hesitate to throw himself in front of a bullet for Itsuka Kendo.


Tetsutetsu defeats Mustard

Overcoming his weakened state, Tetsutetsu defeats the villain Mustard with a single punch.

Overall Abilities: Tetsutetsu has proven himself to be a very formidable individual on numerous occasions. His abilities earned him 8th place in the U.A. Entrance Exam, having the fourth-highest amount of villain points. Thanks to his Quirk, Tetsutetsu's fighting style is straightforward and reckless, letting his hardened body take opposing hits while delivering counterattacks. As even bullets cannot pierce his skin when his Quirk is active, Tetsutetsu is capable of turning himself into a human shield for allies or defenseless civilians.

Tetsutetsu has shown to be as formidable as Eijiro Kirishima, and due to their similar Quirks and fighting styles, the two were evenly matched during their battle at the U.A. Sports Festival, which resulted in a draw. The two hard-headed students were still on par with each other during their arm wrestling tie-breaker, until Tetsutetsu's Quirk began to weaken due to insufficient iron intake. Another testament of Tetsutetsu's prowess is when he, alongside Itsuka Kendo, took on the villain Mustard, a rather capable member of the League of Villains' Vanguard Action Squad. When the bout commenced, Tetsutetsu had some difficulty contending with the villain due to Mustard's marksmanship and the poisonous Gas enabling Mustard to read movements, all while Tetsutetsu began to suffer from the iron fatigue that comes form overusing his Steel Quirk. After a prolonged battle, however, Itsuka stepped in to blindside the masked perpetrator and dispel the toxic vapor, allowing a weakened Tetsutetsu to finally defeat Mustard with a single punch.

Shoto Todoroki vs Tetsutetsu Tetsutetsu

Tetsutetsu going head to head with Shoto Todoroki, one of Class 1-A's strongest students.

During the third round of the Joint Training Battle, Tetsutetsu displayed drastic improvement. The collaboration attack between him and Pony Tsunotori, allowed Tetsutetsu to take Shoto Todoroki by surprise, briefly pin him down, and force the pyro-cryokinetic into a one-on-one confrontation with the metal fighter. Tetsutetsu was able to easily counter Shoto's fire and ice attacks, bring him into close range, and use his brute strength to overpower the recommended student. The steel-transformed hero was still capable of pressuring his opponent even when Shoto was forced to raise his flames to their maximum output, putting Tetsutetsu's metal skin at risk of melting. The power struggle between the Quirk-strained students was brought to an abrupt end with the intervention of their respective teammates, Juzo Honenuki and Tenya Iida. In a last-ditch effort to defeat the Class 1-A opponents, the Class 1-B classmates toppled over a large, partially liquefied tower, resulting in all 4 of the contenders being knocked unconscious.

Tactical Intellect: In spite of his hot-blooded personality, Tetsutetsu is a rather keen and observative individual. When he and Itsuka encountered Mustard, Tetsutetsu was able to correctly deduce, from the latter's school uniform, that the villain was in the same age range as the U.A. students. During the third round of the Joint Training, Tetsutetsu knew that his Steel Quirk will be an effective counter to Shoto's Half-Cold Half-Hot Quirk, so he brought the two opposing students into a battle of endurance, in which Tetsutetsu was confident he could defeat Shoto. When Shoto increased the intensity of his flames, Tetsutetsu surmised that the heterchromic was trying to force heat into his body.

Tetsutetsu's resolve

Tetsutetsu's resolve to fight back against villains.

Indomitable Will: Tetsutetsu possesses a selfless, heroic spirit that is more ironclad than his body. During the Vanguard Action Squad Invasion, Itsuka tried to remind Tetsutetsu that Mandalay told the U.A. students not to engage the invading villains, but the steel student starkly refused to retreat. An undaunted Tetsutetsu voiced his resolve by reminding his classmate that they are supposed to be heroes, and it is their heroic duty to fight back against criminals who threaten them. He also has a die-hard desire to protect his comrades, as shown when he instinctively took a a bullet from Mustard that was meant for Itsuka. During the Joint Training Battle, wherein he faced Shoto Todoroki, Tetsutetsu's fighting spirit pushed him further to endure Shoto's overwhelming blaze and take on his adversary, no matter the risk to his metal form melting. Tetsutetsu then stated that if he can't put his life on the line in training, then he won't be able to do it in the real world, as high-ranked students and limits are there to be surpassed.



Tetsutetsu's skin turned into metal.

Steel (スティール Sutīru?): Tetsutetsu's Quirk allows him to turn his body into steel.

This power grants Tetsutetsu both augmented defensive abilities to withstand attacks, as well as the augmented strength of his unarmed physical attacks.

Upon losing an arm-wrestling match, he mentioned that he should have had more iron that morning, implying that his Quirk's strength is fueled and affected by his diet containing iron. If he uses his Quirk for too long, Tetsutetsu will suffer from iron fatigue, resulting in his metal form losing its durability. And while his steel body has a resistance to heat, it will melt if the temperatures are high enough. In addition, due to him transforming into metal, Tetsutetsu is susceptible to magntism.

  • Enhanced Durability: Tetsutetsu has enhanced durability thanks to his Quirk. His steel body allows him different forms of punishment for a prolonged period of time, and emerge unscathed, including:
    • Remnants of Villain Bot - Executor falling on top of him.
    • Bullets being fired at him.
    • Crashing through solid ice.
    • Ice freezing him.
    • Shoto's flames burning his body.
  • Enhanced Strength: When using his Quirk, Tetsutetsu's physical strength is increased, enabling him to break through most obstacles. In his arm-wrestling match against Eijiro, his fingers dug through the concrete podium on which the match took place. Tetsutetsu's augmented strength also allows him to tear through steel objects, as shown when he easily tore through multiple industrial pipes in Ground Gamma.

Super Moves

  • Tetsutetsu Fist (俺拳 Ore Kobushi?): Tetsutetsu rushes towards an opponent and delivers a simple jab while in his Steel form. It's strong enough to shatter ice. This move is similar in nature to Red Gauntlet.
  • Horn Dash Hammer (角ダッシュハンマー Tsuno Dasshu Hanmā?): Combined attack between Tetsutetsu and Pony Tsunotori. First Tetsutetsu turns his body into steel and then, thanks to her Horn Cannon Quirk, Pony holds him through her controllable horns and launches him towards an enemy. First used against Shoto during the Joint Training Battle.


4/5 B
3/5 C
3/5 C
3/5 C
4/5 B
Tetsutetsu's stats, according to the Ultra Archive Book

5/6 A-
2/6 D
2/6 D
3/6 C
5/6 A
Tetsutetsu's stats, according to the Ultra Analysis Book

Battles & Events

Battles & Events

Chapter Appearances

U.A. Sports Festival Arc
22. That's the Idea, Ochaco Absent
23. Roaring Sports Festival Debut
24. Mad Dash and Knockdown Absent
25. In Their Own Quirky Ways Appears
26. Chase Down the Leader Appears
27. Earth-Shatteringly Fateful Negotiations Absent
28. Strats, Strats, Strats Appears
29. Unaware Absent
30. Cavalry-Match Finale Appears
31. The Boy Born with Everything Appears
32. Smile, Prince of Nonsense Land! Appears
33. Shinso's Situation Appears
34. Victory or Defeat Absent
35. Battle On, Challengers! Absent
36. Bakugo vs Uraraka Absent
37. Midoriya and Endeavor Appears
38. Todoroki vs. Midoriya Absent
39. Shoto Todoroki: Origin Absent
40. Emancipation Absent
41. Fight On, Iida! Appears
42. Final-Match Time Appears
43. Todoroki vs. Bakugo Absent
44. Relaxing Day Off Appears
Vs. Hero Killer Arc
45. Time to Pick Some Names Absent
46. Bizzarre! Gran Torino Appears Absent
47. Struggling Absent
48. Getting the Knack Appears
49. Midoriya and Shigaraki Absent
50. Kill'Em Dead Absent
51. No, Knock it Off, Iida! Absent
52. Hero Killer Stain vs. U.A. Students Absent
53. From Todoroki to Iida Absent
54. Re: Ingenium Absent
55. Conclusion?! Absent
56. Conclusion Absent
57. The Aftermath of Hero Killer Stain Appears
58. Internship's End Absent
59. Listen Up! A Tale From the Past Absent
Forest Training Camp Arc
70. Wild, Wild Pussycats Absent
71. Kota Absent
72. Day Two Appears
73. Good Evening Absent
74. Smoke Signal Appears
75. Stake Your Life, Hero! Absent
76. My Hero Absent
77. It's Chaos Appears
78. Whirling Chaos Appears
79. Drive It Home, Iron Fist!!! Appears
80. Establishing the Bakugo Bodyguard Brigade Absent
81. Roaring Upheavel Absent
82. What a Twist! Absent
83. Loss Appears
Hideout Raid Arc
84. From Iida to Midoriya Absent
85. Nothing but Fools Absent
86. Before the Storm Mentioned
87. Clash Absent
88. All For One Absent
89. All for a Certain One Absent
90. Reach Out Absent
91. Symbol of Peace Absent
92. One For All Absent
93. One For All's Ember Absent
94. From Teacher to Disciple Absent
95. End of the Beginning, Beginning of the End Absent
96. Home Visits Absent
97. Tell It Like It Is, Mom Absent
Provisional Hero License Exam Arc
98. Moving into Dorms Absent
99. Goodbye Two-Digit Chapters, Hello Three Digits Absent
100. Creating Ultimate Moves Absent
101. The Girl Called Mei Hatsume Absent
102. On Cloud Nine Absent
103. The Test Absent
104. White-Hot Battle! To Each Their Own Strengths! Absent
105. Shiketsu High Lurking Absent
106. Class 1-A Absent
107. Denki Kaminari's Thoughts Absent
108. RUSH! Absent
109. Rescue Exercise Absent
110. Rescue Exercise Continued Absent
111. Smoldering Start Absent
112. What's the Big Idea? Absent
113. Test's Aftermath Absent
114. Result's Aftermath Absent
115. Unleashed Absent
116. Meeting in Tartarus Absent
117. A Talk About Your Quirk Absent
118. Meaningless Battle Absent
119. Deku vs. Kacchan, Part 2 Absent
120. The Three Absent
121. Second Semester Opening Ceremony Appears
U.A. School Festival Arc
169. School Festival Absent
170. With Eri Absent
171. Gentle and La Brava Absent
172. Prepping for the School Festival Is the Funnest Part (Part 1) Absent
173. Prepping for the School Festival Is the Funnest Part (Part 2) Pictured
174. Golden Tips Imperial Absent
175. Morning, the Day Of Appears
176. Deku vs. Gentle Criminal Absent
177. At the Construction Site Absent
178. The Woman Called La Brava Appears
179. School Festival Start!! Absent
180. Unbeknownst Absent
181. For Someone Else Absent
182. Let It Flow! School Festival! Absent
183. Festival All Day Long!! Appears
Joint Training Arc
194. Cold Skies Over U.A. High! Appears
195. Clash! Class A vs. Class B! Appears
196. Make It Happen, Shinso!! Absent
197. Quaotic Quirkstravaganza Absent
198. Known Where You Stand When It Counts!! Appears
199. Operation New Improv Moves! Absent
200. Clever Commander! Appears
201. Foresight Appears
202. Match 3 Appears
203. Flexible! Juzo Honenuki! Appears
204. Tuning Up Appears
205. Detour Appears
206. Match 3 Conclusion Appears
207. Early Bird! Absent
208. Match 4 Conclusion Absent
209. Match 5 Start Absent
210. The One For All Dream Absent
211. That Which Is Inherited Absent
212. That Which Is Inherited, Part 2 Absent
213. Realm of Souls Absent
214. Our Brawl Absent
215. Final Face-Off! Midoriya vs. Shinso! Absent
216. Class A vs. Class B: Conclusion Appears
217. The New Power and All For One Appears
Endeavor Agency Arc
241. Do That Interview! Absent
242. Have a Merry Christmas! Absent
243. Off to Endeavor's Agency! Absent
244. Recommended Reading Absent
245. Rise to Action Absent
246. Message Appears
247. Status Report! Absent
248. One Thing at a Time Absent
249. The Hellish Todoroki Family Absent
250. Ending Absent
251. Just One Week Absent
252. The Unforgiven Absent
Paranormal Liberation War Arc
253. Shirakumo Absent
254. You Could Be More of a Hero than Anyone Absent
255. Hero Hopeful Absent
256. The High, Deep Blue Sky Absent
257. Pass It Forward, to Whomever Absent
258. Friends Absent
259. A Quiet Beginning Appears
260. Life's Work Absent
261. High-Ends Absent
262. Mirko, the No. 5 Hero Absent
263. I Wanna Be With You Guys!! Appears
264. One's Justice Absent
265. Villains and Heroes Absent
266. Happy Life Absent
267. Flames Absent
268. Scramble! Absent
269. The Three of Us Absent
270. Inheritance Absent
271. Dark Cloud Absent
272. Good Morning! Absent
273. The Thrill of Destruction Absent
274. Search Absent
275. Encounter, Part 2 Absent
276. You Cheated...! Absent
277. Who...? Absent
278. Disaster Walker Appears
279. League of Villains vs. U.A. Students Appears
280. Red Riot Appears
281. Plus Ultra Absent
282. Footfall of Destruction Absent
283. 75 Appears
284. Deep Blue Battle Absent


  • Tetsutetsu's surname is composed of the kanji for "iron" ( tetsu?) and "clear, philosophy" ( tetsu?), and his first name contains "pierce" ( tetsu?), and an archaic kanji for "iron" ( tetsu?).
    • Aside from being a clear reference to his Quirk, his name may be a joke about how similar he is to Eijiro Kirishima; his name sounds redundant, with each kanji being pronounced like the word for "iron."
  • Tetsutetsu ranked 8th during the U.A. Entrance Exam with 49 Villain Points and 10 Rescue Points.
  • According to Tetsutetsu's profile in Volume 4:
    • He likes fighting games.
    • His favorite food is spinach.
    • Horikoshi likes his design and wants to draw more of him.
  • Tetsutetsu and Eijiro share many similarities with each other:
    • They share the same birthday (October 16).
    • Both have prominently pointed teeth.
    • They share the same stats in the Ultra Archive book.
    • Them and their Quirks were formally introduced in quick succession, while in identical situations: emerging from the wreckage of Villain Bots.
    • Both wanted to stand out during the U.A. Sports Festival, but were disappointed that they couldn’t, upon realizing their similarities to each other.
    • In the anime, their U.A. Sports Festival entry poses were the exact same.
    • Their Quirks, Steel and Hardening, are functionally similar and described likewise, including the weakness of losing power in a drawn out battle, and making their bodies harder than stone.
    • Their fighting styles are the same: straightforward and reckless, letting their hardened bodies take opposing hits while delivering counterattacks.
    • Both use their Quirks to turn themselves into human shields to protect their allies.
    • They both chose Fourth Kind's office for workplace experience.
    • Both have similar hero costumes.
    • Both have a Super Move that involves using their hardened fists to break through the opponent's defenses, while having the same pose when performing their Super Move.
    • The beginning of their Hero names start with the letter "R".
  • Tetsutetsu ranked in the Top 16 of the U.A. Sports Festival First-Year Stage.
  • Tetsutetsu and his Quirk might be references to the Japanese cyberpunk horror film Tetsuo: The Iron Man.
    • At one point during their fight, Mustard refers to Tetsutetsu as "Terminator", an American movie franchise featuring various robotic killers that are infamous for their toughness and perseverance.
    • Tetsutetsu's Hero name might be a reference to the American movie about robotic boxers, Real Steel.
  • Tetsutetsu's Hero name was misspelled in the original magazine release as "Real Steal", having been fixed in the subsequent volume release.
  • His Quirk, Steel, could be a reference to the DC Comics hero Citizen Steel, whose skin and muscle tissue are transmuted into organic steel. That or a possible reference to the Marvel Comics hero Colossus, who can transform his skin into organic metal at will.
  • Tetsutetsu's English voice actor, David Wald, also voices Snipe.
    • David Wald also voices Gajeel Redfox from Fairy Tail, another character who can cover their body in metal.


  • (To Itsuka Kendo) "I'm in Class 1-B of the Hero Course! If I don't stand up here, what's the point?! I'm gonna find these jerks and beat the snot out of them!"[2]


  1. My Hero Academia Official Character Book Ultra Archive.
  2. My Hero Academia Manga: Chapter 74 (p. 11).

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