Don't let yourself be motivated by personal grudges. We heroes don't have the authority to make arrests or dole out punishment. It's only because of advances in Quirk regulation that we can use our Quirks at all. But vigilantism is strictly against the rules. And if you're caught going off on your own, that's considered a major crime.
Masaki to Tenya Iida in "Kill Em' Dead"

Masaki Mizushima ( (みず) (しま) (まさ) () Mizushima Masaki?),[3] also known as Normal Hero: Manual (ノーマルヒーロー マニュアル Nōmaru Hīrō Manyuaru?), is the current No. 222 Pro Hero[4]. He is based out of Hosu City.


Masaki is a man with messy brown hair and black eyes. His hero costume consists of a blue and white, skin-tight, long-sleeved shirt that tucks into his orange gloves. He wears dark pants, white boots, and sports a signature helmet that features a fish-like fin and blue visor.



Manual has a very kind, attentive and ordinary personality. He has an inspiring attitude, as he wants to become a role model for all modern heroes and can complete any tasks simply. In the extras, it is revealed that Manual chose Tenya Iida because he feels similar to Tenya.[3] He also has a very keen mind and could figure out the reason that Tenya chose his office was to find Hero Killer: Stain.[5]



Unnamed Water Quirk: Masaki's Quirk allows him to control water. He appears to need an outside source of water and is unable to produce it himself.[6]


3/5 C
3/5 C
3/5 C
3/5 C
3/5 C
Masaki's stats, according to the Ultra Archive Book

Battles & Events

Chapter Appearances

Vs. Hero Killer Arc
45. Time to Pick Some Names Absent
46. Bizzarre! Gran Torino Appears Absent
47. Struggling Debut
48. Getting the Knack Absent
49. Midoriya and Shigaraki Appears
50. Kill'Em Dead Appears
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 Appears
57. The Aftermath of Hero Killer Stain Absent
58. Internship's End Absent
59. Listen Up! A Tale From the Past Absent
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 Mentioned
254. You Could Be More of a Hero than Anyone Absent
255. Hero Hopeful Absent
256. The High, Deep Blue Sky Pictured
257. Pass It Forward, to Whomever Absent
258. Friends Appears
259. A Quiet Beginning Absent
260. Life's Work Absent
261. High-Ends Absent
262. Mirko, the No. 5 Hero Absent
263. I Wanna Be With You Guys!! Absent
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 Appears
270. Inheritance Absent
271. Dark Cloud Absent
272. Good Morning! Appears
273. The Thrill of Destruction Absent
274. Search Absent
275. Encounter, Part 2 Absent
276. You Cheated...! Appears
277. Who...? Appears
278. Disaster Walker Absent
279. League of Villains vs. U.A. Students Absent
280. Red Riot Appears
281. Plus Ultra Appears
282. Footfall of Destruction Appears
283. 75 Appears
284. Deep Blue Battle Appears


  • He likes balance and houseplants.
  • Horikoshi states that he likes drawing Manual despite him being a side character.
  • Manual's Pro-Hero name is not belittling according to Horikoshi.
  • From Mizushima, 水 means water and 島 means island. From Masaki, 正規 is read as Masaki, but can also be read as Seiki, which means regular/normal.
  • Masaki's Japanese voice actor, Kenta Ôkuma, also voices Cementoss.


  1. 1.0 1.1 My Hero Academia Manga: Vol. 6, Omake
  2. 2.0 2.1 My Hero Academia Official Character Book Ultra Archive.
  3. 3.0 3.1 My Hero Academia Manga: Vol. 6 (p. 126).
  4. My Hero Academia Manga: Chapter 256.
  5. My Hero Academia Anime: Episode 28.
  6. My Hero Academia Manga and Anime: Chapter 51 and Episode 29.

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