Feat: Vigilante Dedication
You have two identities, each with its own name and abilities. Your social identity is an upstanding member of society, while your vigilante identity is a skilled and cunning warrior. Neither of these identities is a false front; you really are both of these people. If someone attempts to discern your other identity, they must use a Seek action to attempt a Perception check against your Deception DC, as if you were using the Impersonate action. Your Deception DC against such attempts is 20 + your proficiency modifier instead of the normal DC. Unlike with Impersonate, you don't have to attempt a Deception check to interact with someone to conceal your other identity—a check happens only if someone else specifically tries to uncover your other identity.
Changing from one identity to the other takes 1 minute and must be done out of sight from other creatures. As this process involves both physical changes such as clothing and makeup, along with an altered state of mind, other effects that change your appearance don't reduce the time required to change identities.
Your two identities are completely distinct. Checks to Recall Knowledge about one of your identities don't reveal information about the other unless the person attempting the check knows both identities are the same person. Effects that detect you based on your identity work only if you are currently in the identity the effect is trying to detect; otherwise, the effect fails as if the target didn't exist.
To maintain the separation between your identities, some of your abilities have the vigilante trait. Your class feats and vigilante feats are associated with your vigilante identity, and using them while in your social identity may risk exposing you as a vigilante. If your identity is exposed to the public, you lose the benefits of Vigilante Dedication to disguising yourself, but you can spend 1 week of downtime to create a new social identity.