Half-Dopple (5e Subrace)
From D&D Wiki
While it is not exactly a science, dopplegangers and lycanthropes are both within the same group of shapechangers. Shifters of the half-dopple bloodline therefore have abilities like that of changelings. Rather than appear beastly, their skin changes colors and textures to allow them to blend in with different environments and even different species. When a half-dopple shifter shifts, they do not appear more bestial, instead taking on a camouflage. As they are not as physically adept in battle than their cousins, half-dopple shifters rely on trickery and wits.
Ability Score Increase. Your Charisma score increases by 2
Natural Faker. You are proficient in the Deception skill.
Shifting Appearance. Whenever you shift, you can transform your appearance. You can’t duplicate the appearance of a creature you’ve never seen, and you revert to your natural form if you die. You decide what you look like, including your height, weight, facial features, the sound of your voice, coloration, hair length, sex, and any other distinguishing characteristics. You can make yourself appear as a member of another race, though none of your game statistics change. You also can’t appear as a creature of a different size than you, and your basic shape stays the same; if you’re bipedal, you can’t use this trait to become quadrupedal, for instance. Your clothing and other equipment don’t change in appearance, size, or shape to match your new form, requiring you to keep a few extra outfits on hand to make the most compelling disguise possible. Even to the most astute observers, your ruse is usually indiscernible. If you rouse suspicion, or if a wary creature suspects something is amiss, you have advantage on any Charisma (Deception) check you make to avoid detection. This appearance fades when your shifting transformation ends.