Aedor 'Aman(ee) is a Stealth Elite and leader of the Silver Covenant under the command of the Prophet of Mercy. Aedor was not hand picked by Mercy to lead the Silver Covenant, but in fact was the immediate replacement for the previous leader now deceased.
During the Battle of Reach, Aedor was placed under the leadership of Fleet Commander 'Novumee. 'Novumee realizing his potential used him as a personal body guard which came to be a very wise decision when Vasa 'Sindarii, a troubled Sangheili nearly tried to end the commanders life only to be saved by Aedor. 'Novumee ordered Aedor to take Vasa's life if he was not killed by the humans.
Near the end of the battle, 'Novumee was killed when his ship was attacked by a small detachment of human warships. Aedor at that point was returned to the command of Mercy who placed him as the leader of the Silver Covenant task force.