Doppler (Earth-6120)

Dopplers (also called shifters, mimics, doubles, imitators, or pavrats) are a species of shapeshifters who can take the form of anyone or any beast they have encountered, provided it has a similar body weight. They used to live in the plateau near modern-day King's Landing but moved to the city itself after it proved to offer more possibilities of survival.

Source

 * https://witcher.fandom.com/wiki/Doppler