Disaster beasts? Further plan?
Chapter 115
The demonic heretics often had a belief: they should have been born as demons but instead were born as humans. They hated being humans and aspired to become demons and be recognized as such.
To them, demons were more of a superior life-form than humans were.
While this was a twisted belief and psychotic thinking, they were offered the chance to become the servants of demons and thus turned traitors to their own race.
The humans who shunned them and isolated them did not deserve them according to them. They were loyal to their demonic masters and helped them annihilate humanity.
For a demon, infiltration into a human-populated area was quite difficult due to their differing features. However, these individuals were different; they were humans in the first place and thus served as spies when needed.
They spread havoc when ordered and eliminated when told.