Changeling

A race related to the Doppleganger, who are thought to have been a hidden and secret part of the societies of civilization for millennia. They posses the ability to perfectly mimic any person they can visualize, able to shift height, weight and their voice to completely change their appearance. Because of this ability, and their many years of living hidden amongst other people, they are widely distrusted by most.
Not long after the World Forest came in to being, with the world in chaos, many of the connected Changeling groups decided to come out into the open and reveal themselves.