Dopplurganger

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A dopplurganger is a headmate that has the same or similar appearance as another person, without sharing the same source or identity.

Related Terms
It is not to be confused with mimic, a non-introject headmate who can only appear as another member of a system due to not having a visual/physical form of their own.

A facetroject is an introject of a face who has no choice over the faceclaim (any face element that a system member uses for appearance, which can be one already used in-system).