Third Brother

The Third Brother was a Force-sensitive male individual who at some point left the Jedi Order, an organization of Force-users affiliated with the Galactic Republic. They went on to serve as a member of the Galactic Empire's Inquisitorius—an organization during the Imperial Era composed of former Jedi tasked with killing Jedi survivors of Order 66, finding Force-sensitive children, and dealing with political dissents. As an Inquisitor, they were trained by Darth Vader, the leader of the Inquisitorius. Sometime later, the historian Beaumont Kin learned of the Inquisitor's existence. Kin included the Third Brother as an example of the codenames used by members of the Inquisitorius in his book The Rise and Fall of the Galactic Empire, which was published in 35 ABY.

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