Quote Originally Posted by Young_and_Confused
Your right, my friend who is an ESFP has a reasonably developed Ni, but it doesn't overlap that of his very strong Se. I just get confused, because if Ni is supposed to be his 4th function, why does it perform a lot better than it should. He acts very much like an ESFP, but he can be creative at times. So, I tend to get confused when this happens.
No, the ESFp's 4th function - the weakest, the PoLR - is , not .

is the ESFp's 5th function, not particularly strong but not as weak as the 4th.

And being creative is perhaps better associated with , the ESFp's 3rd, or role function - weak, but not as much as .

Just remember that everyone is able to use all their functions to some extent. My 5th function is , and yet I'm neither an emotionless robot or without any ethics.