The Oni

The Oni are a group of demons resulting from the souls of Gaea and Ouranos procreating in the deepest pits of Hell. Because of Hell's atmospheric gas mix that they would all breathe as children, the Oni were rotten to the core. The first thing they did after being created was to set up shop in the Spirit Realm, a completely blank pocket dimension attached to the Nether Realm. Eventually, one of the ancient monks on Ryu 97 accidentally opened up a portal to the Spirit Realm. Once the people of Ryu 97 had been introduced to the Oni, the Oni demanded to be worshipped by the people of Ryu 97 alongside the Gods. This went well for a few millennia until the people of Ryu 97 began neglecting the Oni in favor of the Gods. Angered at this, the Oni invaded Ryu 97 and easily defeated the planet's tiny army. To maintain control of the population without having to directly rule over them, the Oni Demons set up a strict class system that everyone on the planet would have to abide by. Those who rebelled against the Oni Demons' class system would find themselves kidnapped by Ninjas and taken into the Spirit Realm, where they would be sacrificed to the Oni.

Known Oni:

-Jade Oni

-Plague Oni

-War Oni

-Ice Oni

-Death Oni

-Maxwell (originally Spirit Oni)

-Djöfull (Ryu 108 offshoot)

-A few hundred minor Oni