Lio Partagaz was a human male who served the Imperial Security Bureau as a major. He led the ISB Board in the ISB Central Office on the Imperial capital planet of Coruscant and concerned himself with identifying unrest long before it escalated into a threat to Imperial safety. Supervising the ISB Board, which comprised the highest echelon of field operatives in ISB, Partagaz managed eighteen ISB sectorial Supervisors and their attendants, as well as members of the Imperial Navy and Army whenever required. Partagaz organized the supervisors, settled personal or work-related disputes, and managed meetings. He became well-respected within the board and the Empire for his intelligence and competence, becoming friends with Director Orson Krennic. Partagaz served as the ISB board supervisor during a turbulent time in the Empire, with random acts of rebellion appearing throughout the galaxy.