There is only one God.
There is only one God but there is an infinite number of planes. All possible planes exists. They differ in time, size, physical or magic laws. Some are accessible only from some others, but all possible planes exists. All are tunes of the great Harmony, which is the work of God.
On some planes God sung entities and gave them free will to travel the metaplanes. The entities inhabit their plane. They can travel to other planes if they learn ways to do so but belong to the one they are born on. The curse of free will makes entities continously dream of a better place to live so their dreams, songs, prayers, wishes, curses, hates go to other planes and entities inhabiting them. Those prayers strengthen both the planes and entities inhabiting them. With sufficient faith a plane with all his entities can be shifted. Once the life of the entity ends on it's plane, if it will so and is accepted it can move to the plane of it's dreams strengthening it further.
Some planes are closer to God. They witness more of the Harmony. More numerous planes have greater impact on the Harmony, their choirs are better heard by the God.
Earth 2072 is one of the planes inhabited by metahumans. It is frequently visited by metaplanar travellers, because of the primitivity of the entities that inhabit it. Metahumans are prone to being faithful and numerous enough that winning their Essence make a difference in the metaplanar struggle.
There is the Struggle.
If an entity from any plane dominate the Harmony, it could influence the God. Maybe even understand the God. Maybe even become the God itself. Or maybe (a dreadful thought) replace the God. But maybe there isn't one God, but as there infinite number of planes so are infinite Gods and dominating Harmony is a way to become one. Free will is Curse as along with it comes Curiosity. Curiosity fuel Ambition. Ambition fuel the Struggle. Struggle for the Ultimate Reward of becoming a God.
Infinite milleniums ago a War in heavens begun and it last until today...
Dominions and Domains.
There are nine domains in between divided into three spheres as identified by metaplaner traveller Dionysius the Areopagite, who has later returned after his ascension to be prayed to and named a saint.
Starting from the closest to the God.
Sphere of Contemplation
Choir I - Domain of Seraphims
Choir II - Domain of Cherubims
Choir III - Domain of Thrones
Sphere of Cosmos
Choir IV - Domain of Dominions
Choir V - Domain of Virtues
Choir VI - Domain of Powers
Sphere of Planes
Choir VII - Domain of Princedoms
Choir VIII - Domain of Archangels
Choir IX - Domain of Angels
Terra - Domain of metahumans in this hierarchy is considered to be Sphere of Flesh and a Choir X, below are Choirs of the Animals, Choirs of the Insects
Each plane has a barrier in the form of an astral plane. Between the Sphere of Flesh and Sphere of Planes are dominions of all traditions. Dominions serves as a gateway to the higher sphere. There is as many dominions as it's followers, and inifinite number of those that aren't being followed. As soon as a single entity believe in it's existance a plane is created to respond to such dreams. If it gather enough essence it became a gateway to the Sphere of Planes.
Entities from Black magic dominion and Witchcraft dominion that are gateways to the plane of Demons arranged an alliance against Christian dominion that is a gateway to the plane of Angels. Other smaller or larger dominions, like Aztec, Islam, Sworn brothers of the Sword and multitude of Shaman domains fight their own part in the Struggle.
It doesn't mean that this are the only two participants of the Struggle, which is clearly pictured by the Insect hierarchy or Dragon hierarchy making their advances on the Sphere of Flesh. It doesn't mean that the planes do not mix which each other. Fire entities are found equaly often in higher domains, like in their native plane of Fire. The planes are infinite and so are hierarchies but there is only one God.
You aren't common spirits.
You belong to the Choir of Angels (or more specifically Choir of Demons), and thus you have the power called Word of Order, which really is a tune of the Harmony that bends the lesser planes to your will. If you accumulate enough Karma during your lifetime or for some outstanding actions, you might be rewarded with ascension to the higher Choir. Note that you aren't the only higher beings on Earth, and even you can be trapped and bound by a sufficiently knowledgeable metahumans.
Your Spirit Pact is hold by the Archdemon from the Choir of Archangels, it is through this pact that you are gained permission to leave the Plane of Demons and walk on the Domain of Metahumans. More specifically you are his agents on this plane to fullfill his wishes. Spoiling angelic attempts to win over the metahumans and making advances of your own. It is pretty close to what metahumans call 'running'. But being here on order doesn't mean you cannot have some fun with metahumans... all right lots of fun