Imposter
After a long period of captivity, you returned to the surface and were welcomed with open arms, despite your scars and aged appearance. You’ve resumed the life you left behind, re-establishing old connections. The only problem is, it’s not your life to which you’ve returned—you are an imposter.
Whose identity did you adopt? Did you do so with their blessing, or did you leave them for dead? Might they return one day? If so, whose story will be believed?
Common clothes, disguise kit.
Whenever you struggle to maintain the masquerade that you are who you say, a surprising number of people are willing to help you through your “lapses of memory.” They might be deluding themselves, or perhaps they know your secret but provide you cover for reasons of their own. So long as you don’t act completely out of character or get caught in an outrageous lie, you can usually find someone willing to cover for you. This cover most commonly takes the form of excuses for your strange behavior.
Each of your double’s former acquaintances must be won over, until they like you more than they did your original. Even once that’s accomplished, you won’t truly be free of your past until you have reckoned with it. When evidence of your true nature surfaces—or when the person you are impersonating reappears—you must triumph in the court of public opinion. Once you have done so, you will have permanent, legal access to your former self’s belongings, inheritance rights, and so on.