The Didact
The Didact was a Forerunner who held the high status of supreme commander in the Forerunner military, teacher at the College of Strategic Defense of the Mantle and husband to the Librarian, he He wholeheartedly believes in the "Mantle", the Didact was fully opposed to the Halo Array, believing their activation to be a sin beyond measure
Though he believed in the mantle, he believed that the mantle should belong to the Forerunners alone and saw Humanity as a threat rather than the successors that most other Forerunners saw them as.
"The peaceful one is at war without and within."
—The Mantle, Fifth Permutation of the Didact's Number
Following the end of the war Human-Promethean war and the first discovery of the Flood, he advocated a policy of vigilance and research in the event of a Flood resurgence.
He also proposed the construction of shield worlds across the galaxy in order to monitor the galaxy for Flood outbreaks and provide military support should they occur, this strategy was to involve the characteristic star-hopping tactics he had utilized in the war with humankind.
However, a faction of Builders led by Master Builder Faber proposed the construction of a series of superweapons to deal with the Flood instead, and they were successful in convincing the Council to sanction their plans. Having lost the political battle, the Didact was stripped of his power and forced into exile.
In July 2557, the wreckage of the UNSC frigate Forward Unto Dawn, carrying the Spartan John-117 and his AI companion Cortana arrived in the orbit of Requiem, followed by a fleet of Covenant remnant warships.
"I have long dreamt of this day, Reclaimer."
—The Didact
The shield world's defenses detected the intruders and caused them to crash on the surface of Requiem. After landing, both the Spartan and the Covenant forces faced opposition from the occupying Promethean forces, until eventually discovering the Didact's Cryptum on what John and Cortana originally thought to be a communications relay satellite.
The Didact was inadvertently awakened by John-117, and, still maintaining that humanity should not be allowed to reclaim the Mantle, he began to actively oppose both the human and Covenant forces on Requiem. Shortly after his awakening, however, the Didact's Prometheans sided with the Covenant remnant forces present on Requiem, joining forces against humanity.
John-117 and Cortana immediately recognized the danger posed by the Promethean and after the UNSC Infinity had crash-landed on Requiem, they attempted to convince Captain Del Rio of the Infinity to take more drastic action against the Didact before he regained his full strength. However, Del Rio instead opted that they leave Requiem as soon as possible.
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The Librarian
The Librarian was a Forerunner whose real name is unknown, she was the wife of the Didact, the supreme commander of the Forerunner military. She sought to document and index all sentient beings of the Milky Way galaxy, and protect them from being absorbed into the Flood by sending them to the shelter of the Ark during the Flood-Forerunner war.
"Each one of these souls is finite and precious.
And I'm close. Close to saving them all.''"
— The Librarian
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Incomplete article so far, needs further refinement.
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