Extroverted Thinking (Te): Hermione strives to bring order where there is none, going so far as to organize extensive charts, study plans, and homework for the boys. The first time they meet her, she is heading up a search for Neville’s toad. Ron finds her “bossy” at first, because she so easily slides into a position of leadership, which later makes her a good Prefect, able to confront and keep students in line, without allowing her personal emotions to influence her actions. Hermione always chooses the most ethical and logical approach, such as turning in Harry’s brand new broom for inspection, because she fears it was sent by an enemy. She is so time-efficient that not only is all her homework finished in advance, McGonagall trusts her with a Time Turner in her third year.
Introverted Sensing (Si): She frequently references things she has read about, in explaining how things work at Hogwarts (“I read about it in Hogwarts, A History!”). Hermione comfortably adapts to a schedule and doesn’t mind a routine that involves study sessions and extensive research. She enjoys digesting information and can remember it in enormous quantities, which helps her ace all of her exams. Hermione enjoys participating in the traditions around Hogwarts and doesn’t like Ron and Harry breaking the rules; she trusts them, because they have kept Hogwarts safe and efficient for many years. She trusts the texts in her textbooks to be accurate, and becomes frustrated when Harry follows a new set of instructions, to great success (no, that can’t be right; it’s not what the book says!).
Extroverted Intuition (Ne): Her interest in the unknown prompts her to be a voracious reader, even though she prefers to keep her manufacturing of ideas on topic and on serious matters (discerning motivations of adversaries, coming up with possible solutions to problems, etc). Hermione quickly discerns from her books and observing of Lupin’s behavior that he is a werewolf; her instincts are often right about other students. She is sometimes reluctant to commit to one idea or conclusion about someone else.
Introverted Feeling (Fi): As a child, when she is disliked, Hermione goes off by herself to cry; she is sensitive and kind but not always aware of how to express her feelings, which leads her into a continual tug of war with Ron in which her feelings for him translate into bossiness. Hermione feels strongly that her friends ought to share the same moral reservations about House Elves that she does, and is annoyed when they show little interest in helping out with S.P.E.W. When making decisions based entirely on those emotions, she can be somewhat irrational.
