PREMISE (w.i.p/base idea):

Eden, the Garden, has lost its bloom and spark.
Creatures, called Omens, have infiltrated the once-so-pretty place.
Omens are monstrosities created by negative emotions. No one knows how these Omens
come to Eden, but God wants to restore it into the place it has once been.

However, he can't do this alone and so he asks angels he had once sent to earth to come back to Eden
in order to fight against the Omens. It doesn't seem so easy however, as those Angels had been reincarnating
themselves in Earth.


About the Angels:
We are talking about the Nine Choirs of Angels, who have been sent to Earth in order to observe humanity or because they are considered "fallen" and have been banned from Eden. If you are familiar with the 'Hierarchy" of the angels, you get the gist of it. They have now taken human form and have been reincarnated for millennia or even longer. 

First Sphere:
Seraphim
Cherubim
Ophanim/Thrones

Second Sphere:
Dominions
Virtues
Powers

First Sphere:
Principality
Archangels
Angels

We are also talking about different abilities and how strong they are depending on the Hierarchy. What those powers are can still be discussed. There's also cases of Nephilim (angel-human hybrids) around, but nobody talks about them as they are supposed to be "atrocities". Considering the whole reincarnation cycle, this can also be discussed.

If there are many more questions about this feel free to ask, and I will answer ASAP!