Prologue: The shrine.

Devil's are powerful beings of the underworld that contain the 72 pillers of the Ars Goetia there known for the 7 Deadly sins.

The Angels are somewhat diverse in there many beliefs on the Birth of Christ and controversial activity arises within the Glorious Skies and there home of Heaven.
They Carry the 10 commandments.

Fallen Angels are similier to Angels themselves but have been guilty of doing one of the 7 deadly sin's or have been rebelling against God and have been casted and exiled down from the heaven's.

Yokai is the final species that is considered Human in Terms of there Nature, this is where you step in as a Shrine maiden a very powerful one at that.