Ok so there's different ranks of demons in my universe, this is just to sort of show that
I also must mention that in my universe there are multiple different climates, and these climates are separated into planet sized caverns randomly dotted around
Like the normal universe is vast space with a few rocks planets or stars here, the underworld is the opposite, vast rock, stone and sediments containing a few massive caverns, though the underworld does have a surface, where a vast desert lies, as well as a jungle.
I'll go into even more depth about the underworld's climates later on.