Tyan Sul was a Twi'lek male who spent his life in the service of the Jedi Order. One of the many pupils of the revered Jedi Master Vodo-Siosk Baas, Tyan was a peer of such individuals as Exar Kun and Sylvar. When Kun fell to the Dark Side and remade himself as a Sith Lord, Tyan was among those in the Order who participated in the war to stop him. After Kun's defeat, Tyan slowly moved his way up the ranks of the Order, eventually training two Padawan learners to Knighthood and earning the rank of Master himself.