To dream of an empress suggests that you will receive reward and recognition but your inflated ego will cause others to back away from you.
Dreams of an Empress represents feminine power, status, rank, service, and sovereignty.
An empress represents the ego and a desire to impress.
The Empress also represents your feelings toward your mother, nurturing, and your creative impulses. See Queen.
To dream of an empress, denotes that you will be exalted to high honors, but you will let pride make you very unpopular.
To dream of an empress and an emperor is not particularly bad, but brings one no substantial good.