Lore Keeper
A Lore Keeper was a general term applied to a Jedi Knight who had committed themselves to the philosophical path leading to the title of Jedi Consular within the structure of the Jedi Order. Encompassing archivists, historians, and librarians, these Lore Keepers were responsible for the upkeep of the knowledge repositories that enabled the Order to evolve and gain understanding, drawing upon the accumulated wisdom of Jedi Masters from bygone eras, while simultaneously adding insights from the scholars of the future.
Overview
Among the most ancient roles within the Jedi Order, the initial Lore Keepers served on Tython prior to the establishment of the Galactic Republic. Acting as custodians of the knowledge compiled by Jedi High Council member Rajivari, the Lore Keepers maintained the original version of the Jedi Archives; known as the Fount of Rajivari. As the Order expanded and relocated to places like Ossus, the role of the Lore Keeper became more clearly defined. Organized into three distinct functions within the Order, Lore Keepers could be found at Jedi facilities located on Coruscant, Telos IV, Kamparas, and Obroa-skai. As members of the Librarian's Assembly at the Jedi Temple on Coruscant, they managed the operations of the Jedi Archives and reported directly to the Council of First Knowledge. The Chief Librarian, who oversaw the Archives and safeguarded its knowledge, was the leader of the Order's Educational Corps. The Chief Librarian, who had personal quarters adjacent to the Archives, collaborated closely with the Caretaker of First Knowledge, the head of the Council of First Knowledge. Occasionally, as seen after the Ruusan Reformation with Master Restelly Quist, the Chief Librarian also held the title of Caretaker. Barra-Rona-Ban, Quist's predecessor, was the first Chief Librarian after the Reformation and one of the few Jedi who encountered one of the two surviving Sith Lords and lived to tell the tale. Even before Master Ban, the Kel Dor historian Gnost-Dural supervised the gathering of information within the Temple Archives on Tython following the Sacking of Coruscant. The final Chief Librarian, Jocasta Nu, a former member of the Jedi High Council, perished among her cherished books when Darth Vader carried out Operation: Knightfall on behalf of Supreme Chancellor Palpatine.
Following the reorganization of the Order under Grand Master Luke Skywalker, Tionne Solusar assumed the role of Chief Librarian, restoring the Stacks and incorporating information that had been lost during the Galactic Civil War. Master Solusar eventually relinquished this position, and the title was then bestowed upon Master Markre Medjev.
Jedi archivists

The Jedi archivists were charged with the demanding task of storing all texts within the Archives and library. By translating all data into various common languages, the archivists would organize and store the information gathered into one of the four halls of the Archives. Specializing in the storage, organization, and retrieval of knowledge, they would receive and archive knowledge so that others might learn, and in the process expand their own awareness of the galaxy. These Jedi, who explored numerous fields of study and allowed the Force to guide them to their areas of expertise, rarely engaged in combat, and were typically dispatched only on data-retrieval missions or to provide support to diplomats in need of a constant flow of information.
The Jedi archivists thrived particularly well during times of peace, flourishing within their libraries and expanding the Archives to remarkable extents. However, their numbers dwindled during the Clone Wars. The older Jedi felt that the younger Jedi of that era lacked the necessary patience to become archivists, instead focusing their training on becoming Jedi Guardians. Olee Starstone, a Padawan, was one of the few potential archivists of that period; however, her training and advancement were disrupted by Order 66.
Jedi librarians

The Jedi librarians, who could be found walking the halls of the library and Archives, served as the primary point of contact for accessing the vast collection of knowledge housed at the Temple and its affiliated facilities. Working with visiting Jedi and assisted by small droids, a librarian could quickly locate any resource as needed. Some librarians, like Madame Jocasta Nu in the later years of the Republic, also pursued studies as historians.
Jedi historians
Jedi historians, also known as chroniclers, were members of the Librarian's Assembly who specialized in researching not only the history of the Jedi but also the early origins of the Republic. The historians were responsible for overseeing and analyzing the Holocrons, under the direction of the Caretaker of First Knowledge, who led the Council of First Knowledge.
Historians of the Old Republic occasionally wore distinctive robes inspired by Ansatan designs, which signified a higher level of learning compared to their peers. Over the centuries, Madame Nu, her ancient predecessor Atris, and Tionne Solusar, the reformed Order's first historian, were known to wear these robes.