BORN: Prior to 108,445 BCE
DIED: 97,445 BCE
The Librarian, born First-Light-Weaves-Living-Song, was an influential Forerunner, rising to the top of the Lifeworker rate known as Lifeshaper, where she remained for over 10,000 years. Despite being of different rates, she married the Didact early in her life, and remained married until the firing of the Halo Array. The Librarian was vital in establishing wildlife preserves on the Halo Array and the Ark, fighting with the Master Builder for centuries to ensure there was a place to store all the species of the galaxy if and when the Halo Array wiped out all life from the galaxy. Though she primarily worked behind the scenes throughout her life, she was perhaps the most influential Forerunner who ever lived.
Though it is presumed the Librarian died during the Great Purification, her legacy lived on through imprints of her consciousness scattered throughout the galaxy. The first known encounter with one was on Requiem, when John-117 interacted with an imprint that shed light on the history of the Forerunners, the Didact, and performed an unknown change to the Master Chief in order to have him survive the pulse from a Composer. Another imprint was discovered on Mount Kilimanjaro in September 2557, when 343 Guilty Spark was in search of her and access to the Domain. While this request wasn’t granted, the Librarian did state she would collect all her imprints at the Absolute Record for the sake of helping humanity to uphold the Mantle of Responsibility.
The Requiem imprint was discovered again during the Requiem Campaign, and this time it provided Doctor Catherine Halsey with the Janus Key, a Forerunner device used to find the Absolute Record, which contained the location of every Forerunner site in the galaxy. The Janus Key became split in two during a fight between UNSC forces from the Infinity and Halsey, who was taken by Jul ‘Mdama. The Infinity spent the better part of 2557 trying to track down the other half of the key, eventually losing their half to ‘Mdama. Halsey and ‘Mdama, now with a complete Janus Key, traveled to the Absolute Record, where she interacted with another Librarian imprint that guided her inside the chamber.