Demons

Demons are one of the Hells native kind of creatures. There was likely one type of progenitor demon that spawned from the lake of fire, multiplied, spread around the Levels. From there they changed and evolved according to the environments they found themselves in, and what sins and vices they were subjected to. Most demons can be classified according to what deadly sin they represent, though rarer kinds and powerful individuals may represent several types of sins, or fall outside regular classifications altogether.