Wyss, a Kel Dor of the male gender, worked as a servant for the Hidden Ones during the year 43 ABY. His service was to the Hidden One, who was previously known as Koro Ziil, until Luke Skywalker, the former Jedi Grand Master, and Jedi Knight Ben Skywalker, liberated the Hidden Ones from their caverns. This liberation occurred following a duel involving Force powers between Luke and Ziil.