Evil seeks to spread and corrupt to make itself the prominent force between Good and Evil. To do this, Evil must manifest in physical form and actively destroy anything it encounters. Monsters are born of this desire through varying means; a corrupted priest, a scorned lover, a well left in disrepair, a forest burned to the ground in spite. Whatever the source, these creatures are seemingly unstoppable to the common person and they are quick to become their victims.
Jaegers use every tool at their disposal to hunt down these monsters and destroy them, this includes relying on the forces of Evil itself. Witches and those touched by the Fae use their gifts granted by Evil to help in this mission, further complicating the reputation of Jaegers in the eyes of the public. However, the combined methods of the Jaeger are often brutal and effective.
No one is certain where Evil originates. The two known planes of existence, mortal and demonic, are mirrors of one another. Where the mortal plane is mostly Good with Evil, the demonic plane is mostly Evil with Good. The source of Evil in both planes is uncertain, but it is believed that the planes must remain in balance in order to prevent catastrophe.