Silent Shadow (Earth-2042)

"We are the Silent Shadow. Once our charge was varied—assassination, extraction—direct and thorough acts of violence. Our goals, strategic—pointed and precise. Our ends, religious, verging on Godly. Those days are over. Or, at best, on hold. Now we have but one aim... the slaughter of beasts."

- Resa 'Azavayl

The Silent Shadow was a division of special operations Sangheili within the Covenant's Special Operations branch. It was made up of several individual squads. The Silent Shadow undertook numerous missions during the Clone Wars, including assassinations and extractions.

One such squad was led by First Blade officer Resa 'Azavayl. During the Great Schism, Resa's squad took it upon themselves to wipe out every Jiralhanae they encountered. However, Atriox was ultimately able to convince the rest of squad to betray 'Azavayl and join the Banished.

Source

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