Tales of Tolgard
Dopplegangers are monstrous humanoids that have the ability to take on the appearance of anyone. Their natural form, which is rarely seen, is a gaunt, gray skinned humanoid humanoid with long, gangling limbs and large eyes with a blank expression. They have darkvision out to 60 feet.
Dopplegangers are shapeshifters; this is enhanced by their psychic ability to read the minds of their victims. That way, when they assume their identities, they have a lot of knowledge to work with for their impersonation. They have a natural propensity for espionage.
Dopplegangers don’t have any natural habitat per se, they simply go where their interests or work leads them.