Mysterious Beings/Monster Association

The Monster Association is an Mysterious Beings group lead by Psykos. Not much is known about it, except that they are the Hero Association nemesis counterpart.

History
The Monster Association is an unknown group first introduced to Garou by two members of the said organization. They tried to invite him but are turned down, despite being unlikely friendly.

Centipede Arc
Several Members are sent out to take Hero Association members as hostages.

Members
Dragons= Demons= Tigers= Wolves= Unknown=

Webcomic/Manga Difference

 * The Monster Association was expanded upon in the Manga, having more members, and even coming out to the public.