[@Raijinslayer]: Demons are a race of human-like beings, some resembling humans entirely while others boast horns, wings, tails, or other unusual features. They are fast, stronger, and more durable then humans, and possess a strange form of regeneration that works by reversing their "personal time" to reset their bodies back to the uninjured state. They first appeared roughly a thousand years ago, coinciding with the fall of the Archangel Lucifer.

What most people don't know is that the first demons were originally humans, who were changed by Lucifer's fall, which was such a catastrophic event that it tore a hole in reality and exerted a warped form of divinity that altered humans to create demons. The most powerful demons, including the Seven Princes of Hell, originate from this time.

They can be summoned through various means.