Demons

Appearance
Colors, designs and variations differ from each individual and being. Ranging from horns and insect-like appearances to ghastly shadowy beings to corrupted chimeras. They often look similar to mythical creatures of multiple origins from the greek mythology to Japanese myths.

Origin
It is said the Demons were created by Mana, an entity who was created at the same time Vigil was, and has wanted to find it's way into the physical world by sending them to do his bidding. Though it is unknown whether the rumor is true or not.