It's a bit of both. Alu is the city where everyone goes demons, wizards, angels, even a few faeries pop up from time to time too. In Coven though they blend in with the other demons. The way to tell them apart is by the jewelry that they wear and the different type of pendants like Fire demons have pendants that are different shades of red for fire, Water demons have blue, etc.,

I'm still trying to see how everything could be on a map.