Factish

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A factish is a headmate who originated as an entirely unsourced entity and later adopted traits of a factional source. This can be done for any reason. These headmates differ from factives in that they are not introjects. If a factive is an introject of a factional source, a factish is something similar without actually being fully sourced from a non-fictional source. These headmates may or may not consider themselves sourced.

Etymology
This term derives from the term factive. They are “factiveish” in that they do draw from factional sources, but are distinct from factives due to this not being their entire identity or origin. Hence they are “factish” but not “factive.”

History
This term was coined by the Ironwood Collective based on another of their terms coined on Tumblr. It is not exclusive to systems of any particular type or origin, only to systems in general.