Most Astromoprhs are simple spirit energy matrix, neither being divine (angelic/ servitor/ demonic) or soul (living or ex-living being) in origin.
Technically, the term astromorph should not be applied to divine or soul creatures, but in common use they are, as they hae so many similar features.
Non material astreal entities. They don’t really have a "form", as they are just an energy matrix. They are a cloud of self organzing energy.
Now if a person can see into the astreal, they will see "something". It could just be a small cloud, but othertimes the person’s brain interprets the energies and actions associated with that cloud, and the person sees it symbolically.
Astromorphs are native of the astreal and other realms.
Life all living things they travel through their realms looking for "food", energy in this case.
Elemental energies, ley flows, are a regular feature in such places.
Emotional energy is the most common concentrated type of energy for them. Some of this energy leaks from the material realm into the astreal and other realms.
Most creatures graze on this energy. Others "hunt" and try to get closer to their energy sources. These creatures will get closer to the material realm and try to influence it (weak telepathic projects or slight probability control) in an attempt to create better feeding.
The more they feed, the stronger they get. The more power they have, and the more can influence the world. The world and the living things in it generate more emotions of the right type, creating more food for the astromorph