Blank-bodies are often considered the lowest of the night critters. Most night inquirers often rate them just above minor sorcerers. But don't really on hasty generalizations. All vampires are dangerous. Today's myth is the histories I've pieced together about a man named Saulot
This blank body was clever and laid a complex trap or sorts an lured in an honest to gods angel to the banquet. Apparently this clever bastard drained the fucker dry, I must assume the archon didn't think the leech was a real threat. By some unclear or undisclosed means, the leech ate the angel, and remember, when a blank body sucks your blood, they suck out your soul. And angels are all soul.
Another scrap mentions a "benevolent wise and timeless drinker" by same name, Saulot who discovered "the higher way," a cult or philosophy in blank-body culture called "Golcond" or something (spellings vary). This higher way in theory returns the humanity to leeches. If you believe that night inquirers, I have a bridge in San Angeles to sell you.
Another account I found in a 12th century note, speaks of a nest of demonic vipers that were clensed by their father, the Deva eater, called Saulot. It track that a blank body that consumes and perverts the soul of an angel would essentially be a demon.
In short, night inquirers, *never* trust a blank body. Burn on sight.