An Ethereal Doppelganger in Dungeons & Dragons is a sinister and elusive shapeshifter that hails from the Ethereal Plane. These creatures have the ability to seamlessly transition between the Material and Ethereal planes, making them masters of deception and stealth. In their natural form, Ethereal Doppelgangers appear as vaguely humanoid figures with translucent, ghostly features and a shimmering, almost fluid appearance.
Ethereal Doppelgangers possess the uncanny ability to mimic the appearance, voice, and mannerisms of any creature they observe, allowing them to blend in effortlessly and infiltrate societies undetected. Their shapechanging abilities are so refined that they can even replicate the memories and skills of their targets, making it nearly impossible to distinguish them from the original.