Each demon has a special ability/power. For some, it might be the ability to turn into an animal, it could be teleportation, mind control, or even something really out there like being able to sense certain bonds between people/demons.

Demons can turn anyone by biting them.

• Many demons forget who they were as humans, but will subconsciously gravitate towards those they knew in their human lives. This could result in a fascination with a certain human or forming a pack with other demons.