A Force-sensitive Human, Relnex was trained in the ways of the Force by the Jedi Order, eventually attaining the rank of Jedi Master. Following the Great Galactic War and the resurgence of the Sith Empire, Master Relnex returned to the ancestral Jedi homeworld Tython with the rest of the Order and helped rebuild during the Cold War.
Stationed at the training ground in the Tythonian Gnarls, Master Relnex fought against the native Flesh Raiders as they made aggressive attacks on the Order's territories. He carried a scar across his left cheek, testament to his time in battle during the war.