Artifiction

Artificial.
Fiction.
Artifiction.

Ever meet anyone whose personality seems so fake that you're positive it must be, but then you learn that that fake-seeming personality is actually who they are?

Phony.
Only.
Phonly.

Or have you met anyone who seems so genuine that you don't even consider the possibility that it's not who they really are, but then you end up homeless in a ditch?

Worse.
Sewer.
Worsewer.

Or have you ever met someone with multiple personalities, where one of them seems phony and the other one seems genuine, and you never know which one you're making out with?

MPD.
PDA.
MPDA.