A doppelganger’s adopted form allows it to blend into almost any group or community, but its transformation doesn’t impart languages, mannerisms, memory, or personality. Doppelgangers often follow or capture creatures they intend to impersonate, studying them and probing their minds for secrets. A doppelganger can read a creature’s surface thoughts, allowing it to glean that creature’s name, desires, and fears, along with a few scattered memories. A doppelganger impersonating a specific creature as part of a long-term plot might keep its double alive and close at hand for weeks, probing the victim’s mind daily to learn how to behave and speak authentically.

your strength score increases by 2 and your constitution increases by 2

Accustom to lurking in the dark you have gained a keen sense in dark and dim conditions, you can see in dim light as if it were bright and in dark light up to 60 feet but you can not distinguish colours in darkness only shades of grey

you can speak read and write in common as well as one other language of your choice to better blend in with the humans and other creatures you may be forced to come into contact with