Luminaei wear golden armor, and their breastplate bears the symbol of their rank; a sunburst pattern that represents endless wings in flight. They have their own unique salute.
The Luminarei fought in the defense of the High Heavens when it was assaulted by Diablo and his demon forces. Many Luminarei were killed, and in the end, it was not they, but the Nephalem who successfully defended the Arch. Afterwards, the Luminarei were assigned to guard the Black Soulstone.