Mysterious Beings/Monster Association

The Monster Association (怪人協会, Kaijin Kyōkai) is a Mysterious Beings group led by Gyoro Gyoro and Monster King Orochi. Not much is known about it, except that they are the Hero Association's 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.

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

Members
Dragons= Demons= Tigers= Unknown=

Webcomic and Manga Differences

 * The Monster Association is expanded upon in the manga, having more members and having them come out to the public.
 * In the original web-comic, it only had 17 members: Black Sperm, Bug God, Devil Long Hair, Evil Natural Water, Fuhrer Ugly, Gale and Hellfire, Goddess Glasses, Gums, Homeless Emperor, Overgrown Rover, Phoenix Man, Psykos, Pureblood, Royal Ripper, Senior Centipede, and The Great Food Tub.