"Mendicant Bias is trying to prevent us from firing the Array. He speeds back to the Ark, but he won't succeed. Offensive Bias will stop him, and I will burn this stinking menace in your name. And then? I will begin our Great Journey without you, carrying this bitter record. Those who came after will know what we bought with this [false transcendence] - what you bought, and the price you paid."
--The Didact's final transmission.
A Warrior-servant class and a Promethean Forerunner who was one of the commanders of Forerunner military in the Forerunner-human war. He is married to the Librarian.
The Didact was an individual who held an extremely high status in the Forerunner society as supreme commander of the entire Forerunner military. He evidently wholeheartedly believed in the "Mantle" the Forerunners held to protect life. He was also the lover of the Librarian, and the one who eventually activated the Halo Array.
