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. Partagaz frequently questioned his subordinates on their reports, and during one ISB board session, one subordinate, Blevin, shared information about an ambush on Ferrix. Shortly after, Partagaz mediated a conflict between Blevin and lieutenant Dedra Meero, who had requested the raw data of the Ferrix incident, as she believed there was an organized rebel effort based on the theft of Imperial devices.
Not long after, a rebel infiltration team stole an Imperial payroll from the Aldhani garrison. In the wake of this attack, the Empire instigated the Public Order Resentencing Directive and gave the ISB the lead going forward. Still obsessed over the Ferrix incident, Meero managed to convince Partagaz to reassign the sector to her, and the ISB began to coordinate its efforts to identify the "Axis" of the rebels, who, unbeknownst to the Bureau, was Luthen Rael.
The human male Lio Partagaz was a major within the Galactic Empire's Imperial Security Bureau who presided over a meeting of eighteen ISB Investigations personnel as the ISB board, which discussed their reports in the ISB Central Office on the Imperial capital planet of Coruscant in 5 BBY. Partagaz and ISB Supervisor Grandi discussed where the budget for the Ryloth sector the latter requested would go, and the supervisor stated that the resources would be use for anti-Imperial activity surveillance, prompting Partagaz to request specifics by the end of the day. The major then questioned Lagret on the development of an conflict on Arvala-Six, receiving an explanation that claimed the supervisor had not yet completed his memorandum of solutions to storage issues with those displaced by the conflict as his staff was waiting an assessment from Arvala's .
Partagaz led an Imperial Security Bureau meeting.
Shortly after, the major asked those present what was the purpose of the Imperial Security Bureau, receiving an answer from Lieutenant Dedra Meero he deemed incorrect. After defining the Bureau as the organization that treated the "sickness" of disorder within the Empire, the major requested more information on the ambush on Ferrix Lieutenant Supervisor Blevin provided information on. Partagaz then asked Lonni Jung to elaborate on requests for additional protection for traffic to the Abrion sector, and the officer explained that the requests were a proactive measure due to an increased quantity of construction shipments going to the planet Scarif. After lieutenant supervisor Blevin and Dedra Meero fought for information on the Ferrix incident, Partagaz mediated their conflict, advising Meero to submit her sectors' quarterly report and expressing that he was impressed of her detention numbers from Sev Tok.
Shortly thereafter, Partagaz summoned all supervisors and their assistants within the ISB for an emergency announcement, they would not go home, notify their staff and families, and submit their Star Sector and Planetary Emergency Retaliation plans by midnight. Days after the announcement, the major attended a meeting which was led by ISB Colonel Wullf Yularen, who announced what Emperor Sheev Palpatine had decided to do after a robbery on the planet Aldhani carried out by rebels. Palpatine's measures indicated that every ISB supervisor attending the meeting would have access to Imperial Army and Imperial Navy resources.
Shortly after, Partagaz led another ISB meeting, during which he discussed another one of Jung's reports—which included three theories that attempted to explain why the sectors surrounding Jung's were unable to be at peace. Upon the supervisor's request, Partagaz ordered Jung to prepare a survey of all hyperspace lanes leading to Ord Mantell that he would leave on the major's desk the following day. Noting that Supervisor Blevin was "eager," the major asked him if he had good news; however, they were not, with the supervisor instead levying a charge on Meero, who was expanding her control outside of her sectors. The ISB major allowed Meero to explain herself, and she revealed that with a collection of material that suggested that the theft of Imperial military equipment across the galaxy were part of a coordinated project carried out by several rebel groups. Accepting the explanation, Partagaz assigned the Morlana sector to Meero, as he deemed it a distraction to Blevin. After the meeting, at the major's request, Dedra walked with him briefly, being advised to watch her back.
Major Partagaz watches the pilot's starship drifting across space through a screen
Partagaz later attended another of Yularen's meetings, during which he approved of Dedra's request of material to capture and locate Andor to the colonel, as he considered that knowing so little about Andor's employer, "Axis," was troubling. On Ferrix, Meero interrogated Bix Caleen, a local, and communicated her findings—which did not identify "Axis"—to Partagaz. The major believed Andor's mother, Maarva Andor, could be communicating with her son, but Meero clarified that it was unlikely, as her forces were watching Maarva. Shortly after, the ISB captured a rebel pilot part of Neo-Separatist Coalition and believed Anto Kreegyr did not know of the pilot's disappearance. Supervisor Dedro suggested that they could have the pilot and their ship drift carefully into traffic, which Partagaz approved. The major then asked for a meeting with military intelligence about Spellhaus. Shortly afterward, Partagaz watched as the pilot drew the other rebels to a trap. Jung advised him to take an interest in the pilot's appearance in space, as Kreegyr may have been watching and he would suspect that if ISB did not become interested in the rebel ship and its pilot, that they had done something to them, which Partagaz confirmed. Partagaz later ordered Meero to find Axis during a meeting with Jung, Lagret, and other ISB members.
Partagaz had gray hair and fair skin. He was level headed, a trait that served him well as a mediator between the supervisors, and his wealth of experience was relied upon by his subordinates. Although strict in upholding the standards of quality within the ISB, he was tolerant of new ideas should they be adequately reinforced, and would compliment or even encourage productive behavior even if it broke tradition.
The major wore a white Imperial officer's uniform adorned with silver-colored epaulets on his shoulders, a pair of code cylinders, and a rank insignia plaque of five blue squares.
Partagaz, who was portrayed by Anton Lesser, was first pictured in the Andor television series' first teaser trailer released during Star Wars Celebration Anaheim 2022 on May 26 of that year. The major later made his first appearance on 2022's September 28 in Andors fourth episode, directed by Susanna White.
- "Star Wars: Andor Season One Companion" — Star Wars Insider 217
- Star Wars: Dawn of Rebellion: The Visual Guide