gonna have to agree with my invertabrother with the wicked speech pattern here. Going by the old biblical binary then going further with the 'well angles aren't inherently good and demons not inherently bad' cliché of the modern era is kind of...well… a really well treaded path in general. Calling them by those specific names is rather pointless. If at the end of the day each race has an equal 

We also have basically no information on nature of these creatures in a physical or socially sense. If I were to make a casual suggestion on this topic; especially we do go A and D here.

Thoughts on 'Angle' like race.

A race of beings based on an affinity for light. How about they have the ability to manipulate light. To create matter and constructs from said light. It would go a long way to the cultural astatic if that was an intrinsic part of their nature. Hence glowing halos and shining wings ( though the wings could perhaps be organic, meh either way, I do like the idea of wings being a constructed thing tho ) They have built a nation of flying cities of pure solid light among the clouds to separate themselves from everything and to allow them to create a world whole their own.

How diverse is the race of angles. We thinking all pale peeps with white clothing’s? That’s kind of boring as shit. How about system built on the Order of the heavenly hosts. 9 orders of 'Angels' divided into three sphere ( we will come back to this concept later ). Maybe some basic appearance differences ( I'd recommend aspects that are reference to the name sake angles EX: angles of the Cherubim have some sort of animal like feature from one of the animals who are associated with them ( ox, lion, eagle ) ) Perhaps the higher up you go in the angelic rank the more powerful they are at manipulating light and can do bigger and crazier shit with it.

A society built on order to a fault. Everything is beaucracy. You practically have to file paper work to cross a street. Order is all. To that end the three spheres ( told you I'd come back to this ) of angelic hosts work something like a cast system. Angles of the lowest sphere hold almost no policy making power in the society, the second sphere holds some power, the third holds most. 


Thoughts on Demons:

Demons traditionally take many forms and have a great many aspects. So potentially the variations on a demon's racial aspects could be infinite. But that would be silly so lets narrow that shit down a little. How about we make them sort of Environmental? Demons take after their environment. Demons from fiery lands have fiery aspects (red skin, high body temps, immune to fire, fire powers) Demons of earth have earthy qualities/powers, water of water, ect ect. To that end maybe while the Angles live in high flying cities of light in the sky, they take up life on the harsh ground below where ever environment is a super esteem version of said environment, hence they have evolved to take on aspects of their respective environment  to survive them. I feel as if this also works with how diverse the concept of 'Hell' can be. To one hell could be a fiery abbys, to another a endless freezing wasteland, to another dark suffocating tunnels with no escape, ect ect.

Their world is chaos and so is their society. If you could even really call it that. Everyone does what they need to survive. For weaker demons that often means banding together for safety and cooperation. For more powerful demons that sometimes means taking what you need from someone else. Power is a decider, be it the strength of the one or the strength of the many. Perhaps each specific realm of 'hell' has one demon everyone recognizes as the strongest and would be the defacto leader of said hell, though I don't know if that would play any part of our story outside of a culture building trope. 

Anywho those are my thoughts. Take em or leave em. I'm perfectly happy doing trolls/humans/what evers xD