Rebellion (天を射る矢 (リベリオン), Riberion lit. Heaven's Arrow): is an Independent Guild who was removed from the alliance of Legal Guilds some time ago by the Magic Council. In the current time, they seem to function as a 'third-party' between the Legal and Dark Guilds, breaking up fights between the two factions whenever one arises.
Rebellion was a guild founded by Joel Yeager not to long ago, simply to be one of the many guilds created in Earthland. They were a Legal Guild until a certain incident. In which Rebellion was on a meeting with the Magic Council and in the middle of the meeting the guild found out the true intentions of the Magic Council, learning that they were indeed very corrupted. When the Magic Council found that they knew about their secret. They attempted to destroy Rebellion by seemingly executing most of its members and totally burned their guild building to the ground and made it look as if it was a simple accident in which the guild was burned accidentally. They erased the guild from the list of alliance of Legal Guilds and destroyed most of their files. However some of their top members either survived or escaped the massacre, after said incident, they turned into an independent guild and started to follow their own believes and objectives. After being removed from the alliance of Legal Guilds. Rebellion is somewhat seen as a mediator, as they are not allied to either Legal Guilds or Dark Guilds, breaking wars and fights between the two when this is not happening, they do jobs of their own and missions which they believe will help their cause.