Jocasta Nu Jocasta Nu , a Force - sensitive human female , was a Jedi Master who served as the Chief Librarian of the Jedi Archives during the Clone Wars . In this role , Nu would assist fellow Jedi in finding information they needed from the Jedi Archives , and controlled access to the restricted Holocron Vault . Sometime prior to the Invasion of Naboo , Nu sat on the Jedi Council . Shortly before the war , she assisted Obi - Wan Kenobi in his attempt to locate the planet Kamino in the Archives . After not finding any information , and Nu ' s insistence that any item that did not appear in the Archives did not exist , it was determined that information about Kamino had been erased from Jedi records . During the war , Nu was attacked by bounty hunter Cato Parasitti , who was helping Cad Bane steal a holocron from the Holocron Vault . She later assisted Ahsoka Tano in finding the thief who stole the Padawan ' s lightsaber . After the fall of the Jedi Order and the Republic , and the rise of the Galactic Empire in their place , Nu survived the purge of the Jedi unlike many of her fellows and went into hiding , all the while attempting to preserve what she could of the Jedi . Determined to put a permanent end to the Jedi , the newly crowned Emperor dispatched his agents in the form of Darth Vader and the Inquisitorius to hunt her down , a hunt which culminated with Nu ' s death at the hands of Vader . Biography . Early life . Jocasta Nu was born on Coruscant prior to the Clone Wars . She was found to be Force - sensitive and brought to the Jedi Temple eventually becoming a Jedi Master and served as Chief Librarian of the archives in the temple . She had complete confidence in the accuracy and integrity of the records she maintained , suggesting that an item that did not appear in her library did not exist . The Separatist Crisis . Due to her pride of the Archives , she voiced her opinion to Obi - Wan Kenobi when he came to the archives in search of the planet Kamino , based on information from his friend Dexter Jettster . Nu was not familiar with Kamino and noted that it was not in the archives , becoming irritated when Kenobi suggested her records could be incomplete . She left him to his investigations , seeing to Zett Jukassa . Clone Wars . Following the First battle of Felucia , Nu was assigned Anakin Skywalker ' s Padawan , Ahsoka Tano , to serve as the Jedi Archives new security officer after the young Togruta was assigned to Temple duty for disobeying orders . She took Tano on a tour of the archives , and showed her the entrance to the Holocron Vault , explaining that only members of the Jedi Council were allowed access due to the sensitive information contained inside . When the Jedi Temple was put on high alert due to Cad Bane ' s efforts to break into the Temple , Nu informed Master Ord Enisence of this after noticing him in the archives working at a terminal seemingly unconcerned . However , she was then knocked out by Enisence , who was actually the Clawdite bounty hunter Cato Parasitti in disguise and working as Bane ' s accomplice in the heist . Nu was then dragged away and relieved of her lightsaber by Parasitti , who shapeshifted to impersonate the Master Librarian . Tano subdued the bounty hunter after determining that she was an imposter . After Nu recovered , she and Tano took Parasitti away and brought in more security , but were unable to prevent Bane from escaping with a holocron . Following that incident , Nu assisted Tano when she came to the library to examine criminal records to locate the thief who stole her lightsaber . Nu suggested that Tano admit to Skywalker that she had lost her lightsaber , but the Padawan refused due to how often her master told her to never lose her weapon . Nu admitted that finding thieves was not her area of expertise , and recommended that Tano seek the help of Jedi Master Tera Sinube , an expert on the Coruscant underworld , to find the thief . She led Tano to the elderly Cosian , who was sleep ing at a table in the archives . They woke the sleeping Master , and Nu left the two to begin their search . After Master Plo Koon discovered the wreckage of a vessel on the desert moon of Oba Diah that was identified as the ship of former Jedi Council member Sifo - Dyas and which still contained his lightsaber , Nu was asked to brief the Jedi Council on the events surrounding the Jedi Master ' s demise . She informed them that Sifo - Dyas ' last assignment was to Felucia , where he was killed attempting to negotiate a peace treaty between two tribes . Plo Koon inquired about the status of Sifo - Dyas ' body , and Nu informed him that she did not know as further records on the mission had been ordered sealed . Master Mace Windu asked who had sealed them , and Nu revealed that the Office of the Supreme Chancellor was responsible . Windu thanked Nu for her briefing and she took her leave to allow the Jedi Council to discuss the situation . Near the end of the Clone Wars , Nu explained to Caleb Dume , Sammo Quid , and Tai Uzuma , three Jedi Initiates who had passed their Initiate Trials , how Jedi Knight s chose Padawans . Dume questioned how and why the Jedi settled on that method to chose their Padawans and if anyone had ever questioned it . Nu noted that Dume was questioning it now , but he protested that he simply wanted to know how that method had been developed . Preserving the Order . Nu survived the destruction of the Jedi and during the early stages of the Jedi Purge she attempted to gather and preserve whatever she could of the Order ' s legacy . Nu went into hiding and started recording holocrons and collecting information with her assistant Gar , in an attempt to start a school for new Jedi . Nu was included in a list of possible survivors , which Darth Sidious gave to the Grand Inquisitor . The Inquisitorius was instructed to find Nu , though Sidious requested Darth Vader to bring Nu to him alive . Sidious believed that Nu had a way to access key information for the future of the Empire which was hidden away in the Jedi Archives . She realized that the Jedi Archives contained a holocron with a list of every Force - sensitive child catalogued prior to Order 66 , and returned to Coruscant to rescue it , bypassing clone trooper s with a mind trick to enter the Temple . Shocked at the devastation within , she spotted the Grand Inquisitor poring over the knowledge she once kept , but forced herself to focus on her mission . Entering a secret vault within the Archives , Nu reunited with Cator and retrieved the holocron , leaving the droid on guard once more , but upon sighting the Inquisitor again , Nu accosted him with her lightsaber , offended that he dared to read her book s only to toss them aside . After a brief lightsaber duel against the Grand Inquisitor however , she was bested and as he prepared to deliver the final blow , he was interrupted by Vader ' s blocking saber . Vader demanded her alive ; in the confusion Nu telekinetically hurled several books at the two and fled . She later retreated to a computer access room in the Library and subsequently initiated deletion of the archive files . As Vader continued his pursuit , Nu assembled a weapon capable of fighting Vader for the next round . After failing to kill him with the weapon and ruining her lightsaber in the process , Nu attempted to kill Vader by self - destructing it but he managed to redirect it so that it blew a hole in the Temple ' s outer wall . Grabbing a green - bladed lightsaber from a shelf , Nu took the opportunity to escape out the gap , but was forced to fight off several Coruscant Guard shock trooper s led by Commander Fox , who also fired on Vader by mistake due to Fox neglecting to provide a description of the Sith Lord . Snapping the clone commander ' s neck , Vader ordered the trooper s to take Nu alive , stopping her with the Force after she attempted to commit suicide in order to deny them the information she held . Restrained and confined aboard a patrol transport , Nu was forced to watch as Vader accessed the coveted information : the Kyber memory crystal , containing a list of all known Force - sensitive children in the galaxy . Though regarded with contempt by the troopers restraining her for being a Jedi , Nu revealed that they were taking orders from one themselves . Vader was in fact fallen Jedi Knight Anakin Skywalker , which Nu had learned from Cator as the droid held off Vader beforehand . Vader then proceeded to blast all of the shock troopers out of the gunship , killing them in order to keep his secret . When Nu inquired as to what her fate would be , Vader ignited his lightsaber but met no resistance from Nu , who accepted her death . The list of names was then destroyed by Vader , to ensure that his master could not use it to find and train other Sith apprentices . Legacy . Though Nu perished on her failed mission to locate prospective Jedi students , her sacrifice was ultimately not in vain . Her secret vault of Jedi artifacts and knowledge was tended to faithfully by Gar for many years until he grew too old to continue protecting it and sealed it by commiting suicide . The vault , and the information inside it , was then uncovered many years after her death by Vader ' s son Luke Skywalker , who was attempting to rebuild the Order . Personality and traits . Due to her position as Chief Librarian of the Jedi Archives , Nu was sometimes too confident that her library had the answers for all the questions , to the point that she could easily became irritated by the suggestion that her records could be incomplete , for example when Kenobi asked her why the Archives didn ' t have any information about Kamino . Powers and abilities . Despite being far from the strongest Force user or lightsaber combatant , Nu was still capable in both regards and possessed basic skills as a Jedi . She was therefore able to use telekinesis , which she could use as a tool or as a weapon , from activating and assembling a holocron to summoning the books in Jedi library to fire them at Vader and the Grand Inquisitor . Additionally , Jocasta demonstrated skill in the mind mind trick , which she used on clone troopers to get them to ignore her . While she was well past her physical prime , Nu also demonstrated feats of physical prowess , such as jumping down several stories from a crater made in the wall of the Jedi Temple . As a lightsaber duelist , she was skilled enough to briefly hold her own against the Grand Inquisitor , until she was overwhelmed by his own skill and strength . She could also deflect several blaster bolts fired at her by multiple clone troopers . Behind the scenes . Jocasta Nu was played by actress Alethea McGrath in and voiced by Flo DiRe in " " . Prior to the canon reboot in 2014 by the Lucasfilm Story Group in order to allow The Walt Disney Company to explore new storylines , Jocasta Nu ' s backstory had been explored and developed in a number of sources , which detailed her career in the Jedi Order , but these stories are now part of the " Star Wars " Legends continuity . The most notable difference between the canonical counterpart of Jocasta Nu and her " Legends " counterpart is that in the " Legends " continuity , she was killed by Darth Vader during Order 66 , as seen in the , in which McGrath reprised her role ; while in the new canon , she survived Order 66 before being killed by Vader .