Angel

Angels, also known as Guardians, are a secretive race of beings who are humans born with the ability to bond with a halo. They are the appointed warriors on Earth. They are appointed specifically to control and preside over the Shadow World, as well as over the demons and monsters who inhabit it. They have fought the demonic forces valiantly for well over the span of two thousand years, creating their own culture and civilization within mundane society. Their mandate is to keep the peace in the Angel World and keep it hidden from the mundane world while protecting the inhabitants of both worlds.

Despite their connotation, Angels are mortal and therefore vulnerable to old age and death; however, their angelic blood endows them with special abilities that allow them to achieve feats beyond humanly possible through the possession of their angelic halo.