Mortal Kombat Races
Onis are the natural inhabitants of the Netherrealm. The Onis are vicious
beings who are in constant warfare in the Netherrealm. Some mortals may even be
twisted to becoming an Oni if they are suffering in the Netherrealm for long
periods of time. They ally with no one else besides each other unless a greater
purpose of theirs is to be served.