The Empress Brilliant is a species of hummingbird in the family Trochilidae and the order Apodiformes, it is measures around 15 centimeters.

The bill is black, the legs are dark grey. The tail is variable in length, especially in adult males. In the male, the forehead, throat and chest are dark green shimmering. A light purple square spot decorates the center of the throat. The belly is glossy golden green, the cap is dark green and the rest of the upper parts is dark bronze-green. The lateral rectrices are extended and they are nuanced with bronze.

In the females, the upper and middle rectrices are bronze-green. The dull black lateral rectrices are bronze iridescent. The throat center and chest are greyish with small green speckles, turning to bronze green on the sides and golden green on the abdomen.

The hummingbird of the Andean cloud forest in northwestern Ecuador and western Colombia. 

Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest.