Ulis was a Trandoshan residing in the Cularin system in the final years of the Galactic Republic; he was employed by the organization of Nirama, a crime lord of the Oblee. He would eventually depart from Nirama's operation. By the time the Clone Wars were underway, Ulis had joined the Believers, a Sith cult operating within the Cularin system. Ulis was part of a Believers team sent to the Cularin asteroid belt by Len Markus. Their mission was to stop the Heroes of Cularin from shattering three crystal shards, which were channeling energy to the Darkstaff, a Sith artifact in Markus's possession.