I am an INTJ (see Myers-Briggs Type Indicator). I, however, once met an INTJ female who was so much more INTJ than me that she flushed me into INFJ territory, even putting me so much out of balance that I came to wonder if I hadn't turned completely INFP. It was quite a shock, recognizing myself in the other sex, which might happen to predominant types but not to INTJs. It was a shock for me and a disgusting freakish incident for the other one.
My favourite INTJs in their quality of an INTJ:

INTJ females are extremely rare. Besides the one I once met, I recognize few people qualifying, even in fiction. Maybe Roald Dahl's Matilda but she's magical or Charles Addams's eponymous Wednesday but she's too unfamiliar (I believe she's also psychic in some renditions of the character). Besides, they are both children. Society probably crunches so much INTJ females that they transfigure beyond recognition. My INTJ encounter was a real-life sample but you have to handle that like nitroglycerin while I perceived it as an exotic and inebriating perfume. The best way to break the bottle.