Devil

Devils should not be confused with Demons.

It can be said that Demons work indirectly for God as agents of destruction to counter mankind.

Devils, on the other hand are beings that openly defy God and would hope for nothing other than to destroy the system God has established.

Despite this stance, Devils can not oppose God directly because the forces of God's army is vastly stronger than their own. Thus, their preferred method of disrupting the system is to make contracts with mankind and steal their souls so it will not return to God.

Devils are descended from the Devil King ラサウム (Razaum)

Devils can bypass a Demon's invulnerability. However in practice, Demons tend to be a lot stronger than Devils that are summoned to the surface.

There are some Devils that are even stronger than the Demon King, but they reside in the Devil World as rulers and do not come to the surface.