Angel and demon classification is done in terms of spheres, with both angels and demons having three spheres. Each angelic sphere has a corresponding demonic sphere
First sphere classification denotes race, which determines physical characteristics, like size, shape and number of wings, physical strength and hair colour.
Second sphere classification denotes spiritual type, which determines the nature of an angels spiritual energy.
Third sphere classification determines social rank and responsibilities within heaven.
Other classifications are used for any angel or demon with human blood.