Nyan (ニャーン, Nyān; Viz: Nyaan)[2] is a Dragon-level Mysterious Being and an executive member of the Monster Association.


Nyan has the appearance of an anthropomorphic cat-like monster, with light colored fur and a choker with a bell attached to it. He has horizontal stripes across his back and tail with three vertical stripes crossing his forehead to the back of his head.


Human Monster SagaEdit

Monster Raid ArcEdit

Nyan broke into Smelly Lid Prison to find Puri-Puri-Prisoner, but he wasn't there. Nyan instead decided to do business with the prisoners.[3]

Super Fight Arc Edit

Nyan later transformed many prisoners into monsters using the Monster Cells and they all broke out of prison.[4]

Nyan and prisoners

Nyan talking to the monsterized prisoners

Monster Association ArcEdit

Nyan instructs the monsterized prisoners about their roles in the upcoming battle against the Hero Association, and allows them to try to get payback against Puri-puri Prisoner. Afterwards, he takes a short nap.[5]

Nyan and the other executives of the Monster Association are summoned by Gyoro Gyoro for an as-of-yet unknown reason.[6]

Abilities and PowersEdit

Nyan is an executive member of the Monster Association, and was strong enough to subdue the prisoners and officers at the Smelly Lid Prison.[7]

Going by his threat level, Nyan is assumed to be extremely strong. This is evidenced by the fact that he was the only other monster in the Monster Association besides fellow Disaster Level Dragon Gouketsu to be tasked with recruiting new members during the initial monster raid.

Physical AbilitiesEdit

Enhanced Strength: While the full extent of his physical prowess is unknown, Nyan was capable of subduing the inmates in the Smelly Lid Prison, all of whom are considered to be worst kind of criminals that there is, without receiving any injuries.[8]

Major BattlesEdit

Participants Chapter(s) Episode(s) Result
Nyan vs. Smelly Lid Prison (Off screen) 66 None Win


  1. One-Punch Man Manga; Chapter 89, page 67
  2. One-Punch Man Manga; Chapter 74, page 6
  3. One-Punch Man Manga; Chapter 66, page 15
  4. One-Punch Man Manga; Chapter 74, page 6
  5. One-Punch Man Manga; Chapter 89, page 67
  6. One-Punch Man Manga; Chapter 94, page 150-151
  7. One-Punch Man Manga; Chapter 74, page 6
  8. One-Punch Man Manga; Chapter 74, page 6