Changeling

The Changelings were individuals controlled by the Graske that mimick a lifeform and send the real person to Griffoth. They appear exactly like the original, but their eyes flash a greeny-gold colour occasionly hinting at their disposition. A Graske created Changeling for a Slitheen, a Urchin, a Mum and a Dad before they where succesful returned home from Griffoth. (DW: Attack of the Graske)