First-Light-Weaves-Living-Song (Earth-2042)

"Each one of these souls is finite and precious. And I'm close. Close to saving them all."

- Librarian

First-Light-Weaves-Living-Song, better known as the Librarian, was a female Force-sensitive Forerunner Lifeshaper and the head of the Lifeworker rate for ten thousand years. She was married to the Didact, the Promethean supreme commander of the Forerunner military. During the Forerunner-Flood War, she led the Conservation Measure, which sought to index all species in the galaxy and transport them to the Ark and other conservation facilities before the Flood could reach them or the Halo rings were fired. Frequently clashing with her husband over the morality of the Array, the Librarian died at the end of the war when the rings were activated, willingly stranding herself on Coruscant within range of the Halo effect. She viewed the Human species as having special significance and is responsible for grooming Humanity to be the Forerunners' successors. 100,000 years after the firing of the Halo Array, the Librarian resurfaced through personality imprints to help continue guiding the galaxy towards the Mantle.

Source

 * https://www.halopedia.org/Librarian