I think a lot of them are like this myself, as in, and paralleling the “ancient aliens” theory, that there were ETs incarnate into non-human physical bodies that interacted with the Sumerians and other Mesopotamians around that time, and became mythologized as the gods, and later demonized by the rising JCI religions. This form sounds like a Tall Grey-like being (some of these are not grey).
For myself I have also seen newer discoveries such as Sun’tal’ock from the Book of Azazel in this form in trance. I mentioned that here in 2021. Others appear to me as “Arcturian” or with a “Nordic” or “Tall Whites” -like aspect… Sitri appears like this for me and that hasn’t changed in a while now since I mentioned that here too, which was really a surprise and not at all what I expected. 
Now I’ve had a few years to explore the idea I’ve had more and more alignment with info coming in, and nothing really offering a different or better option.
So I have a feeling you were able to see through to the beings more self-aligned image rather than just a glamour used to imply something about it… No costume. But since there’s a few and I couldn’t say how many or which entity is from which species - and also expect some have incarnate as different ones as I have over the millennia (humanity is kinda new) - hen as usual the best bet is to reach out and see if you can get it to communicate if it’s any of the names we already know about. There’s umpteen trillions of off planet souls though so it may be someone new.