- "No freedom without power. No power without rebirth. No rebirth without destruction."
- ―Preamble to Oni's founding charter
Oni was an anti-government group that was based on the fringes of the space colonies and operated throughout traversable space. Designated a terrorist group by the military due to its extremist methods and practice of choosing civilian targets when sending "political messages", Oni was also in possession of a small but efficient armed force of spacecraft and mobile suits. It was led by Raven Sammael and was funded by its powerful network of organized crime and mercenary contracting.
- The word "Oni" is a Japanese word meaning demon or ogre.