Demonkin

Demonkin are humanoids created by diabolical acts knowingly and willingly performed by humanoids. They are completely amoral, can perfectly imitate the form, voice and behaviour of any humanoid and in some cases common beasts and have strong psychic powers. Their only loyalty is to the humanoids and (if applicable) spirits or demons responsible for their creation. Unlike Sorrowchildren, they are potentially immortal, not succumbing to normal illness or old age. They do not need oxygen to survive, and can survive all but the most extreme heat or cold, but otherwise their requirements for survival are similar to those of 'natural' humanoids.