This is my universes interpretation of angels, one type atleast
As the demons of the underworld were made by Synthia, the main deity of my universe, to test out her own ability to create, angels are somewhat the same, and as the demons of my universe aren't inherently evil, my angels aren't inherently good either, they are just made to serve and act on behalf of certain deities, they're appearance may even change depending on which deity they serve under, but only minorly.
Their actions usually depend on what their deity wills they do as well.
They have black gooey blood and three tongues, they glow white.

This isn't the only type of angelic creature, but it is one of them.