Zier, a member of the Hutt clan Besadii, stood out as one of Durga Besadii Tai's main competitors for the position of clan head after the passing of Aruk Besadii Aora. Furthermore, he and Durga were cousins.
Following Black Sun's elimination of all threats to Durga's authority, Durga appointed Zier as his second-in-command, aiming to monitor his adversaries closely. Being a proficient Hutt, he meticulously managed Besadii's finances, even disputing Durga's decisions on multiple instances when he believed the Hutt lord was allocating excessive credits to the pursuit of his parent's murderer.