Demon
An unnamed species of Demon existed before the universe who were enemies of the Disciples of the Light.
Biology
Demons are immensely tall humanoids with skin colours ranging from blood-red to pale green, and horns ranging from long and curved to short and straight.
History
Before this universe, the Demons fought a war against the Disciples of the Light. When they came into this universe, they fought in Mutter's Spiral, however the Demons ended up outnumbered and imprisoned by the Disciples and became imprisoned in various places including simple prisons under time rifts (such as where Abaddon was buried, under the Cardiff rift) and in complex traps around black holes (such as where The Beast was buried, in Krop Tor orbiting K3J75). The Discples then seemed to disappear from existence.