Demon

Demons is a term that refers to a vast array of beings that are malevolent and only desire death, suffering, and destruction, as well as corrupting those that are not demons. Demons take many forms and what is considered a demon can vary from one person's definition to another, with some being purely spiritual beings, other being purely physical beings, and some being able to switch between the two. The most famous demons are those that originate from Hell. Demons often overlap with other creatures such as some of the most violent Fae, undead such as Vampires (with the most powerful of the Vampires, Dracula, being virtually indistinguishable from one of the Satans), or most monsters. Nearly all entities can fall into becoming a demon, even Gods who fall from grace can become a demon if they become evil enough. There is no such thing as a "good demon" as a something that becomes good would then cease to be a demon, instead becoming a spirit, fae, angel, or other similar entity. Someone who has fallen into becoming a demon can be restored to their original self, though doing so is almost impossible and requires that the demon in question abandon their demonic side. Despite being an oxymoron, there are exceptions that are not just demonic and keep that power, while also being good or having parts of themselves that are not demonic, though they are extremely rare.