Devils have existed in the Underworld since before Genesis, and are the ones who challenge the power of God. They preside mainly in the deepest, the Ninth, floor of Hell. They are known to be one of the strongest beings in the Underworld, being the natural opposite of an Angel, hence in addition to their natural elemental affinity, they can also wield Darkness. However, unlike their Holy counterparts, Devils tend to be self-centered and often fight among each other in search of dominance and power. As such, the Angels who work hand-in-hand with each other, often gain the upper hand when dealing with Devils as a result of their "lone wolf" ideology.