Jocasta Nu was the Chief Librarian of the Jedi Archives at the time of the Clone Wars with a penchant for being a bit overconfident in the completeness of her Archives. Her patterned robes bore the symbols of the Ansata, representing her devotion to knowledge and learning.During her career, Jocasta trained many Padawans, including the future Emperor's Hand, Jerec, Olee Starstone, whom she tutored in the years prior to the Clone Wars, and Jin-Lo Rayce, founder of the Agents of Ossus.As a young Jedi Knight, Jocasta served as an archaeologist for the Jedi ExplorCorps and for decades after her service, she wore her lightsaber at all times, in memory of her time as an active field agent of the Order.Some time prior to 49 BBY, Jocasta Nu stepped down after spending ten years as a member of the Jedi Council. She took up the mantle of Librarian and served as Archives Director for over thirty years. She knew Count Dooku quite well, and proclaimed him to be one of the greatest Jedi of all time.During her position of Chief Librarian, she gathered a very precise and extensive knowledge of the galaxy. She often gave advice to Jedi Knights who were looking for information about the planets they were sent to on a mission. During these years, her confidence in the Archives was whole, claiming that if something was not in the Archives, then it did not exist. To her embarrassment, this statement was belied when Obi-Wan Kenobi was unable to find Kamino in the Archives since it took a child student under Yoda's instruction to suggest the obvious: that the records were tampered with to hide Kamino's existence.During Operation: Knightfall in 19 BBY, Jocasta told her latest padawan, Jin-Lo Rayce, to flee the Temple through underground passages into the Coruscant underbelly. She later faced Darth Vader, wielding her blue lightsaber. The Dark Lord lifted her with the Force Grip and impaled Jocasta through the chest after she denied him access to the Temple's signal beacon, killing her instantly. Jocasta's body was found by Obi-Wan Kenobi and Yoda when they returned to Coruscant.When the Galactic Empire emerged, official records compiled by Sate Pestage stated that Jocasta Nu was executed for harboring information that threatened the Empire and its citizens.