Osi Sobeck / Legends Osi Sobeck was a Phindian who lived during the time of the Clone Wars . Sobeck worked for the Confederacy of Independent Systems as the warden of the infamous prison known as the " Citadel " , which was based on the volcanic planet Lola Sayu . A sadistic and cruel demeanered officer , Sobeck specialized in the torture and mental breaking of Jedi incarcerated at the Citadel as prisoners of war . In 21 BBY , Sobeck handled the incarceration of Jedi Master Even Piell and his crew , captured by Separatist forces after his fleet was suddenly ambushed en route to Coruscant . Count Dooku , the public face of the Separatist movement , personally assigned Sobeck the responsibility of learning the coordinates of a well hidden hyperspace lane known as the Nexus Route , data which Piell and his commanding officer , Captain Wilhuff Tarkin , memorized prior to their capture . The two were able to resist Sobeck ' s relentless torture , and a Republic operation aimed at the rescue of Piell and Tarkin was soon authorized . Despite Sobeck ' s best efforts to contain the situation , the Republic rescue force succeeded in extracting Piell and his crew . During a final effort to prevent the prisoners ' escape on a small island north of the facility , Sobeck attempted to murder Tarkin by throwing him into the flow of lava , but was quickly silenced by an attack from one of Jedi Padawan Ahsoka Tano ' s two lightsabers . Biography . Separatist service . Osi Sobeck was a male Phindian allied with the Confederacy of Independent Systems during the Clone Wars . Sobeck served as the warden of the notorious prison complex known as the Citadel . The prison was infamous for its high security , having been designed to hold members of the Jedi Order as prisoners . Osi believes in torture , a very cruel way to get information from enemies . Incarceration of Even Piell . At some point in 21 BBY , the Separatist forces captured Jedi Master Even Piell and transported him to the Citadel . Piell and his officers were transferred to the Citadel under the watch of Osi Sobeck . While being held at the prison Piell was interrogated in order to obtain coordinates for a key hyperspace route known as the Nexus Route , control of which could influence the outcome of the Clone Wars . Sobeck relied on the use of fear to break his prisoners - the one thing Jedi spend all their lives training against . The Phindian used an A4 laboratory assistant droid and a few commando droids to torture the Jedi and get the information out of him by any means necessary . Even though he did not know that the Galactic Republic was planning to rescue Even Piell , he knew that the Jedi would soon arrive to rescue him . His predictions came true as a rescue team soon came in the form of a shuttle , full of Jedi and clone troopers frozen in carbonite . Due to his suspicions and the current occupancy of the prison , he ordered his droid K2 - B4 to do a detailed scan of the incoming vessel . Because of them being frozen in carbonite , the scan did not detect any life forms . But the warden ’ s tension did not ease . But when an electro - mine guarding the Citadel exploded because of a clone trooper accidentally triggering it , Sobeck knew a rescue team had arrived . Thus , Sobeck ordered all of his troops to their positions and prepared his special unit of commando droids . In the mean time , the Phindian , within the Citadel Command , watched the intruders ' every step with the use of security cameras . Osi Sobeck took the opportunity and activated a ceiling magnet , which attracted all the weapons of the Republic force towards the ceiling . After which all the weapons , which were made of metal , were attracted to the sealing . Unfortunately , because Skywalker ’ s prosthetic arm was also made of metal , he along with the guns and lightsabers got stuck to the ceiling . At that moment the warden ’ s special unit of BX - series droid commandos came to arrest all the Jedi and clones and take them back to the holding cells . Sobeck saw that as an opportunity to torture the Jedi with electricity , but Skywalker managed to grab his lightsaber and he disabled the entire machine . This in turn released all weapons from the magnetic hold and the strike team managed to destroy all the commando droids . This turn of events angered Sobeck and when Rex shot the surveillance cameras – that was the last straw for the warden and he decided to go out there and takes matter in his own hands . To his dismay , he was too late and the Republic navy officers , including Captain Wilhuff Tarkin , had already been freed . a commando droid , inspecting the prison cell , reported that the cellmates had escaped . Infuriated by the statement of the obvious by the commando droid , he ordered his captain to “ teach ” the droid what happens when they use words as “ escaped ” . The droid in the cell was shot in the head for his failure , which in a way was used by Sobeck to let out some of the built - up anger . After the display , two security droids reported to the Phindian that the Jedi and clones were headed for the upper levels , which unknown to Sobeck was a diversion by Obi - Wan Kenobi to lead the attention away from the second group of Republic forces exiting the Citadel . The warden , assuming the Jedi were to steal transports , sent orders to all his battalions to stand guard on the landing pads and requested that he wanted all prisoners back . But in a few moments an explosion occurred that shook the entire complex . Sobeck and his droids were shaken by the explosion , but they stood their ground . Sobeck was later contacted by Separatist leader and Confederacy Head of State , Count Dooku who was upset as he heard about the Jedi ' s success of rescuing Piell and and his men . After K2 - B4 informed him , Sobeck went to answer the Count , accompanied by K2 - B4 . After Count expressed his frustration about the conflict , Sobeck assured him that everything was under control and ended transmission . He then grabbed K2 - B4 and warned her never to surprise him like that again to which K2 - B4 obliged . Later on , after K2 - B4 laid a trap for Kenobi ' s team , he observed them falling into the trap via video screen and laughed at them as droids and turrets surrounded the team . After the captured team were brought into the Citadel Command , Sobeck asked for the information on the Nexus Routes and threatened to execute the clones if they did not listen . Piell replied that the clones were ready to die in this war for anything to which Sobeck grabbed a blaster rifle from a commando droid and shot a clone in the head . He then proceeded to execute another clone when K2 - B4 informed him that Skywalker ' s team had been spotted . Sobeck ordered the prisoners to be taken for interrogation . Later on , however , a security droid informed him that prisoners had escaped and what was worse for Sobeck , K2 - B4 informed him that Count Dooku wanted to contact him " immediately " . Looking at the holographic view of the outside , Sobeck noticed that a part of the pipeline had exploded and quickly deduced that the two teams were probably heading for the landing pad as that was their only way of escaping . Ignoring contact with Dooku , he ordered all units to the landing pad . His predictions proved correct as a firefight soon erupted there which resulted in the death of Echo , the destruction of rescue team ' s ship and the remaining members of the team escaping to the bottom caverns . Death . However , Dooku contacted him again and reminded him of the importance of the Jedi ' s capture and threatened him by saying that Sobeck ' s promises to capture the Jedi were the only thing keeping him alive . Sobeck then ordered the release of Anoobas in an attempt to pick up the Jedi ' s scent . When the team were spotted , Sobeck personally led a squad of STAP - mounted commando droids to capture them . Upon sighting the team , he fired at them . However , his STAP was shot down by Fives and he crashed to the ground . Tarkin tried to shoot him but he missed . He then grabbed Tarkin , angry that he was unable to obtain the information , and was about to throw him into the lava , but was stabbed through the chest by Ahsoka and killed . Personality and traits . Osi Sobeck was known to be a sadist and enjoyed the torture of others . This quality of his was perfect for the position he occupied as warden of the Citadel . This sadistic nature was also shown during the encounter with the Jedi rescue team that had come to save Even Piell . He showed a great amount of pleasure in the sight of Anakin Skywalker being electrocuted by one of his traps . As he did not tolerate failure , he showed the same sadistic tendency towards his own troops by enjoying the punishment of any droid that failed him in any way . Aside from the sadism that Sobeck displayed , it was also evident that this Phindian was insane . This often displayed by the fact that he would go on and talk to himself , even though there were many droids around . Although probably insane , he was able to predict his enemies ' move as he had done so twice . Sobeck was also honest to his superiors , but avoided reporting failure if he thought success was imminent . Behind the scenes . Osi Sobeck was voiced by James Arnold Taylor . Taylor voicing multiple characters in the trilogy was addressed in an inside joke where Kenobi comments on Sobeck ' s voice . James Arnold Taylor wanted Sobeck ' s voice to resemble the manner of talking displayed by actor .