Second Nature

You have spent a lifetime in another’s form. Surviving by blending into society, you’ve mastered your appearance, skills, and senses while living in this form long enough to pass as a true born member of the Divergent Persona’s race. You gain the following benefits:

• You gain Expertise on Charisma (Deception) checks made to avoid detection if you arouse suspicion in your Divergent Persona's appearance.
• Choose a skill in which you have proficiency. You gain expertise with that skill, which means your proficiency bonus is doubled for any ability check you make with it. The skill you choose must be one that isn’t already benefiting from a feature, such as Expertise, that doubles your proficiency bonus.
• Choose a tool in which you don't have proficiency for your divergent persona. You gain proficiency in the tool. 

Adapted from Second Skin by Derpos and Supreme Adaptation by Vortigous