Gar was a human male who, after Order 66 and the following Jedi Purge, aided Chief Librarian Jedi Jocasta Nu in her efforts to preserve what was left of the Jedi Order and was based in Jocasta's sanctuary. After the death of Nu on Coruscant following a mission there, Gar guarded the cave for many years until, too old to do that, activated an explosive, killing himself and sealing the vault. Years later, Luke Skywalker discovered Nu's sanctuary, which contained archives and holocrons.