Hermione Granger: ISTJ
Introverted Sensing (Si): Hermione is a practical, no-nonsense person who has enormous respect for existing facts, rules and methods. She is uncomfortable deviating from the “tried and true” and is often mistrustful about new or different ways of doing and understanding things, prompting others to refer to her as “close minded” (The Tale of Three Brothers, 7x21). She believes that existing rules and regulations exist because they work, and is uncomfortable with breaking school rules and deviating from “official” instructions, evidenced, for example, in her mistrust of the Prince’s notes in Harry’s copy of Advanced Potion Making (The Half-Blood Prince, 6x09). Hermione has an excellent memory, and has a natural affinity for recalling detailed information, making her both a superb student and a useful source of information for Harry and Ron. She relies enormously on previously established information to guide her opinions and judgements, often turning to books in moments of uncertainty (“When in doubt, go to the library”), and as a result can struggle with acting in the present moment, forgetting to use magic, for example, when trying to remember how to fight Devil’s Snare (Through the Trapdoor, 1x16). Though her ability to remember copious amounts of information leads her to excel in topics that can be learnt through a textbook, Hermione often struggles to grasp subjects that require more improvisation, such as flying (The Midnight Duel, 1x09) Defence Against the Dark Arts (The Hogwarts High Inquisitor, 5x15) and Divination (The Quidditch Final, 3x15). She is suspicious of anything that doesn’t fit into her own understanding of the world, often scoffing at Luna’s outlandish beliefs, or berating Harry and Ron for believing in things (such as the Deathly Hallows) that she perceives to be ridiculous. She also struggles with facing the unknown or obscure, prompting Professor Trelawney to refer to her as having “very little aura” and “little receptivity to the chances of the future” (Talons and Tea Leaves, 3x06). She is most comfortable working in areas that are characterised by established rules and guidelines, eventually gaining a job at the Ministry as the Deputy Head of the Department of Magical Law Enforcement.
Extraverted Thinking (Te): Hermione has an enormous need for order and control in the external world. She has excellent organisational skills, which she puts to use in creating study plans, charts and timetables for both herself and her friends. Unlike Harry and Ron, who are more inclined to make feeling-based decisions, Hermione tends to reach conclusions through logical thought. She is highly rational, being able to easily solve the riddle in Snape’s chamber through the use of “cool logic” (Through the Trapdoor, 1x16), and often works through issues on the basis of objective facts and evidence, putting her in a position of opposition with Harry (who is more inclined to reach intuitive conclusions) at several points throughout the series. At times, her reliance on logic can be a hindrance in situations that require high levels of sensitivity: when Lavender’s rabbit dies in accordance with a prediction made by Professor Trelawney, Hermione tries to make Lavender feel better by rationalising the situation rather than providing emotional support, which only makes Lavender feel worse (Flight of the Fat Lady, 3x08). Similarly, she tries to solve a conflict between herself and Ron by bringing up the lack of evidence he has to support his side of the argument, which only makes the rift between them larger (Gryffindor vs. Ravenclaw, 3x13). Hermione often makes decisions with the intentions of achieving a specific goal, and sometimes acts without consideration of the feelings of the people involved. She bosses people around in the hope that she will be able to correct their behaviour without considering the effect it will have on her ability to make friends, and gets Harry’s Firebolt confiscated in the hope of preserving his personal safety, which ends up causing a strain on their friendship instead. Despite this, Hermione is highly effective at finding practical solutions to problems, and is often quick to take action: she leads a search party to find Neville’s toad after learning he has lost it (The Journey from Platform Nine and Three Quarters, 1x06), and executes the plan to learn whether Malfoy is the heir of Slytherin by brewing a polyjuice potion with Harry and Ron (The Polyjuice Potion, 2x12). Hermione’s ability to make quick decisions and organise the environment around her make her an effective leader, earning her the position of school Prefect in fifth year.
Introverted Feeling (Fi): Hermione is private with her own feelings. Though not inclined to show it, she is deeply sensitive to criticism from others, crying in the bathroom for several hours after overhearing some of Ron’s unkind comments (Halloween, 1x10). She often finds it difficult to express how she is feeling, and tends to rely on her higher functions as a way of dealing with her own emotions, such as pouring herself into researching Buckbeak’s case as a way of distancing herself from her conflicts with Harry and Ron (Te) or criticising the behaviour of her classmates as a way of expressing her feelings about breaking school policies (Si). More often than not, Hermione deals with her emotions on an independent basis. She rarely seeks people out for guidance or counsel, and often retreats into herself as a way of dealing with intense emotional pain, such as isolating herself by way of dealing with her feelings for Ron during sixth year, or crying herself to sleep every night when Ron abandoned her and Harry on their hunt for Horcruxes (Godric’s Hollow, 7x16). She lives by a strict set of personal values, and is reluctant to condone or engage in behaviour that she believes is morally wrong, being scandalised when she believes Harry has slipped Felix Felicis into Ron’s drink (Felix Felicis, 6x14), or when Harry continues to “cheat” in Potions by using the Prince’s instructions over the official ones (The Half Blood Prince, 6x09). She is highly sensitive to things that stimulate her personally, and becomes passionate and animated when responding to injustices, turning her outrage about the unfair treatment of house elves into a campaign brought about by policy (Si) and action (Te).
Extraverted Intuition (Ne): Though she is a curious person, having a huge passion for reading, Hermione’s approach to gathering information is fairly close minded. She trusts logical reasoning over intuition, and is suspicious of people who are more inclined to come to conclusions without proof, refusing to believe Harry’s suggestion that Draco could be a Death Eater (The Slug Club, 6x07), or that the Deathly Hallows could exist (The Deathly Hallows, 7x22). She is open to discussing possibilities with Harry and Ron, but is equally as quick to shoot down their ideas in the favour of more practical outcomes, preferring to accept answers that fit in with her own narrow worldview (Si). Despite this, Hermione is quick to make links between different pieces of information, being able to correctly deduce that Lupin was a werewolf (Cat, Rat and Dog, 3x17), and that the Basilisk was moving around the castle by using the plumbing (Cornelius Fudge, 2x14). Her Ne becomes slightly more developed as the series goes on, when Hermione becomes more accepting of Luna’s outlandish beliefs and starts to be energised by her own ideals, prompting her to found SPEW in hope of bettering the conditions for house elves.