Adronik Hyllus, a Human, held the rank of captain within the Imperial Military of the reconstituted Sith Empire. Before the year 3666 BBY, Hyllus entered into marriage with a Human woman from Jurio after the planet fell under Imperial control. In 3666 BBY, Hyllus and his wife became parents to a son named Vector; Vector was raised during the Imperial rebuilding efforts on Jurio and subsequently enlisted in the Imperial Diplomatic Service while still young.
The initial reference to Adronik Hyllus appeared in the Codex entry for Vector Hyllus, a companion character available to the Imperial Agent class in the video game Star Wars: The Old Republic, released in 2011.