The Sixth Brother, born Bil Valen, is a minor antagonist in the epic space opera franchise Star Wars, appearing as a major character in the 2017-2018 comic series Star Wars: Darth Vader: Dark Lord of the Sith, a minor character in the 2023 novel Inquisitor: Rise of the Red Blade and the main antagonist of the 2016 novel Star Wars: Ahsoka.
The Sixth Brother was a male Force-sensitive Inquisitor who worked for the Galactic Empire. He was originally a Jedi Knight, but fell to the dark side and joined the Inquisitorius where he became an agent of the Galactic Empire and servant of the Sith where he was to down and eliminated any surviving Jedi the Empire could find.