Lord Priden was a male Human from Raxus Prime who became a Sith under the tutelage of Lord Haeresis. Born as Celasun in 155 ABY, he became tainted by the Dark Side of the Force at a young age by unintentionally using Force Travel when he was trapped out in Raxus’ poisonous atmosphere. After that incident, he became sinister and gloomy, and had to wear a respirator because of the damage the his lungs sustained due the prolong exposure outside of the sealed compounds on Raxus.