The Chastener

The Chastener was a powerful intelligence, though whether it was simply a programed similar to the or the stored consciousness of a an actual Forerunner was never made clear. It was encountered by Arthur Onegin in the final months of the Human-Covenant War. Decades later, it would come into contact with the renegades Simon-G294 and Shinsu 'Refum when they breached the isolated facility in which it was stored.