For me, at least, writing consists very largely of exploring intuition. A character is really the sense of a character, embodied, attired, and given voice as he or she seems to require. Where does this creature come from? From watching, I suppose. From reading emotional significance in gestures and inflections, as we all do all the time. These moments of intuitive recognition float free from their particular occasions and recombine themselves into nonexistent people the writer and, if all goes well, the reader feel they know.