Nyan

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

Appearance
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.

Monster Raid Arc
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.

Super Fight Arc
Nyan later transformed many prisoners into monsters using the Monster Cells and they all broke out of prison.

Monster Association Arc
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.

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

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

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 Abilities
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.