They are Demons.

Sshitherosz are scrawny, diminutive, ugly, disturbing-looking and twisted, resembling a skeletally thin man about four feet tall with wings and an elongated skull.They are capable of flight.

They are masters of getting on people's good sides. They find people in vulnerable positions, people who are outcast, or alone, or for whatever reason weak and needing some kind of support and coax their victims into reaching for the infernal power they offer. Thus, leading them into becoming warlocks. The favorite tactic of the sshitherosz is to recruit warlocks from among the young, naïve and ambitious.