The Virus, a Kaleesh individual of male gender, functioned as a criminal associate and protector for Cada Bliss throughout the Cold War era.
During the year 3643 BBY, the Virus and Cada Bliss, his accomplice, came into possession of a Twi'lek relic known as the Star of Kala'unn. Vette, an old adversary of Bliss, sought to recover the artifact, leading her and Darth Baras' Sith apprentice to face the criminals at the Nar Shaddaa spaceport. The Virus perished in the ensuing conflict, and his partner, Cada, was compelled to relinquish the Star of Kala'unn.