I think of impersonation as one of Ni’s eminent attributes. My ISFP brother is an effortless mimic and has in fact built a career around it. My INTJ brother-in-law is fair-minded and also does that annoying thing where he imitates people’s speech patterns and accents (no Fe). I’ve learned to spot ENFJs quickly by their easy command of vivid verbal characters (great actors, if they can discipline their ego and go a bit deeper). I think in INFP it can manifest as a sort of fuzzy expertise or encyclopedism in cultural areas that interest them.
It might be because the Moon rules my chart, but I’ve observed that growing up I put tremendous psychic effort into impersonating the people around me, both their outer and their inner life. Partly as self-defence, partly as harmony-seeking (Libra Moon), partly out of fascination.
One of the problems with this is that with my parents and brother, the models are so complex, deeply implanted, and prior to my ego that there is major contagion, they affect my mental processes and emotions and I impersonate them without meaning to. I’ve had a huge and difficult ten-year process that is by no means concluded (I am just about thirty) of individuating away from these impersonations and weeding them out, preventing them from speaking through me. Maddening.
Specifically, my parents are INTP and INFP, so these three inner persons have a mutually reinforcing Si bent to them that is basically inappropriate to my functioning, and which I can never express with any competence; and two of them are hostile to my Ni ego. I suppose it means I can manage just a bit more Si than most INFJs, which might be why I can get along so well with my ISFJ partner. (Or I find her much more self-assured Si a refreshing change. Or, to be dark, possibly I am more invisibly and helplessly snared by it.)
Thoughts? Similar experiences? Advice? Remonstration?