Ghost Jedi was a band from Mrlsst that became very popular following the deaths of Palpatine and Darth Vader at the Battle of Endor. The name was in honor of the late Jedi Knight Taj Junak. Their music was written by Rorax Falken, including "Soldier's Life is a Sorry Thing," and performed by his students.
In addition, the members of the band were secretly Falken's confidantes and served as his henchmen during his involvement in the Phantom Project.