Heh I never realised the idea of a nonbinary angelmonster was so… biblically canon. :p
Actually biblical descriptions of angels were pretty good for getting ideas on Xzhyrxiel. I like the idea of them wearing at least one pair of wings like a cloak, and giving the wings digits kind of like Postulator wings but also just making them regular bird wings at the same time, to match that note about the wings having hands on them.
I’m not sure about the part about multiple faces but… maybe. Actually incorporating the eyewheels from Ezekiel could be cool too.