Qu Rahn

Qu Rahn was a Jedi Knight who searched for the lost Valley of the Jedi. The rival to his quest was the Dark Jedi Jerec. When his friend Morgan Katarn discovered its whereabouts, he entrusted his lightsaber to him, to pass on to his son Kyle Katarn whom he sensed was strong to the Force.

He then moved to confront Jerec. He was captured on Dorlo and then aboard the Vengeance where Jerec read his mind and learnt of Morgan Katarn's knowledge of the Valley. Rahn was then heroically executed, after a short duel on the bridge, but his ghost was able to contact Kyle and warn him about Jerec.

Qu Rahn was one of the few survivors of the Great Jedi Purge, and since his ghost appears after his physical death, he must also have leant the ability to live on after death from Qui-Gon Jinn.