The Archangels are the fighting forces of Heaven. Some are recruited from exceptional souls that must pass a gruelling test of moral conviction. Others are born from the Lights of the Powers Above. The Archangels are more powerful than Demigods, and a few of them possess enough power to rival gods. Archangels appear to be vulnerable to the same powers and artifacts that kills deities, as shown when Xena tried to kill Michael (and nearly succeeded).
Physically, archangels look much like Guardian Angels, winged, strong and beautiful. The primary difference is in the wings: archangel wings are black with emerald green streaks. In attire, the archangels also differ, wearing elaborate plate armor as opposed to robes.