Two souls in one body. A brain, split down the middle. New identities created through dissociation.

You aren't one person, you're two. When you finish a Safe Rest, roll 1d20. On an odd roll (1, 3, 5, etc.), your active and dormant personalities swap, with your dormant personality gaining control over your body.

Each personality has it's own Class, Stats, Skills, and potential Backgrounds. Your Ancestry remains the same.