Cyrus (サイラス Sairasu) is a U.S. Army soldier and member of Grey Fox.

He is a young Caucasian man with a skinny build and pale skin. He wears a boonie hat, a camouflage soldier uniform, and tactical gear.

During the final confrontation between Shane Caxton and Roberta, the latter had accidentally shot Garcia Lovelace, grazing his liver but leaving an exit wound. Subsequently, Cyrus tended to Garcia's injury and stopped the bleeding. After doing so, he informed Caxton that while the bleeding stopped, the wound would still have a chance of being infected. At that point, Caxton decided that they needed to abandon their concurrent operation because of state militaries moving toward their positions. Cyrus was then ordered to help Garcia up so that Roberta could walk with him back to the Black Lagoon to leave the Golden Triangle.