A post I originally made over at INFPgc.
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I would like to chime in here, fueled by a sudden inspiration to type the main characters of Brave New World by Aldous Huxley.
INCLUDES SPOILERS.
John the Savage represents a maladapted, unhealthy INFP to me. It is obvious that he's a dreamer, as can be seen in his idealization of the World State and his love for Lenina Crowne. His adherance to his values is such that he ultimately perceives himself to have strayed too far - willingly or not - from them, so much that in his eyes the violation is irreversible. He ends up commiting suicide, ends up being a small sigh in a loud, buzzing society, the culture of which consistently shocks John into finally choosing death.
Bernard Marx, the Alpha Plus psychologist, is a similarly misfit INTP. He's consistently plagued by self doubt which usually ends up overshadowing his high intelligence. His inferiority complex, brought on by circumstances over which he had no control, is another layer of bernard's shell, of which the readers sees much. He's also socially inept, partly due to his physical defects.
Helmholtz Watson seems like an ENXJ to me. In his position, he's confident and influential, and not always bent on doing what the society expects, as the novel makes us witness. Restless for a change waiting to be brought on, He's generally supportive of Bernard and sympathetic towards John. Of all the main characters in the novel, it is he that is usually the most civil.
Mustapha Mond, the great strategist of the World State, reads like a coin toss between INTJ and INFJ. In his well intentioned and ultimately successful quest to bring about happiness to the whole world, he has repressed his own individuality, free will, and also confiscated the same of all others. As the only character who uses some form of empathy in the book - with the possible exception of Helmholtz - he is unique in that he can truly understand (and argue against) the existential dilemma of the protagonists, and makes for a competent, though not in any way evil, adversary.
Some words I will type for Lenina Crowne before hitting the submit button. Although she's a conditioned character, in her we can see some form of the ESFJ, always concerned - in her own way, keeping in mind the novel's unique setting - for the well being of others that she's constantly around. Not understanding her traveling companion Bernard's (who she characterizes as "odd", in affectionate fashion) unusual desires, she isn't in any way interested in changing that which she is used to. Of course, that doesn't stop her from being an affectionate and helpful character, where need be, as we can see from her outlook towards John.