It isn't all that common in my world, either. Seeing Angels, though... [He closes his phone, content with his notes for now.] The planes of the world work in certain ways. The RG is at the bottom of the heap, with the UG above it and the Noise plane between them. Normally, people would only be able to perceive the plane that they're on and any planes beneath it. But, certain people have the ability to see at a somewhat higher frequency... which keys into my ability to see the UG from the RG. Angels reside on a plane much higher than the UG, so the only way to see one is if they lowered themselves to a plane that you could perceive. Much in the same way that we're invisible to those on the RG until we lower our own Frequencies.