Maniax' are henchmen who ended up joing with Joker in Batman: Shadow War. It is a large group of thugs work for Joker as well as his henchwoman and right hand, Harley Quinn. They were generally made up of insane and violent, very sick criminals and Joker had brutal initian standards; forcing them to survive death traps or murder members of their own family before they are even allowed to join the gang. Joker regularly mistreated his fellows, even sometimes killing them for entertainment, however they are fiercely loyal to him.