Replacer
You are aware of your counterpart, of course. But more than that, you loathe them. You have started your adventures, at least in part, in order to find this person, remove them in some fashion, and take their place.
Have you located your counterpart yet? Why do you seek to replace them? Are they repugnant and you would right their wrongs? Do you seek to balance the universe? Or do they simply have the life that you were meant to have? What if you do eventually find them—and realize you have no wish to fulfill what was once your burning ambition?
Disguise kit, quarterstaff, eyepatch, traveler’s clothes, tent (1 person).
You have focused so intently on your counterpart that you’re not sure where your own personality begins and ends. This enables you to take on those of others as well. You can study a creature with an Intelligence of at least 6 for 10 minutes to gain an expertise die on all checks to impersonate them. While your inflection, mannerisms, and manner of speaking are all spot-on, additional checks, such as with a disguise kit, or props, such as the proper clothes, may be required to truly convince others. You can only impersonate creatures that are of the same type as yourself.
If you pull off a long-standing impersonation of your counterpart (or perhaps a different person), you may eventually legally become them. If they still live, they might be considered the imposter. You gain any property and servants associated with their identity, and may be connected by those they had connections with, interested in hiring you (or at least who they think you are). Alternately, you could denounce your counterpart’s past actions and follow a different path using their identity. Work with your Narrator to choose another background’s advancement opportunities.