Hadiss the Vaulted, otherwise known as Hadiss, held the position of archduke for the Stalgasin hive, which was a Geonosian hive situated on the planet of Geonosis. Hadiss depended upon the success of gladiatorial competitions held at the hive's Petranaki Arena, as their prosperity greatly contributed to solidifying his position and influence within Geonosian society.
During Hadiss's time as archduke, a Geonosian by the name of Poggle the Lesser was born into the lower social classes of the hive, and he developed aspirations to become archduke himself. Poggle gathered supporters from among the lower classes and launched attacks on Hadiss's most valued assets and people. The conflict between them grew more intense until Poggle ultimately killed Hadiss not long before the First Battle of Geonosis took place in 22 BBY.
Within current Star Wars canon, the initial mention of Hadiss occurred in "Visiting Geonosis," an article featured in the "Guide to the Galaxy" section of Star Wars: Build the Millennium Falcon 19, a magazine released by De Agostini around May 13 of 2015.
- Star Wars: Build the Millennium Falcon 19 (Guide to the Galaxy: Visiting Geonosis) (First mentioned)
- " Geonosis and Other Planets in the Outer Rim " — Star Wars Encyclopedia
- " The Separatists " — Star Wars Encyclopedia