hermione's a geeky stj (o, but aren't they all) i dont really care which.. probably estj.
she has far to much knowledge into the cho harry situation in the fifth(?) book to be intp. other types shock me like that, how they analyse drama all the time. an estj said stuff like that to me once and my brain died.
im leaning towards estj for these reasons:
she's forceful, as displayed when she corrects peoples spell prounciations. i should probably come up with a better example but im too tired.
she cries quite a bit which could push her over to the istj side (which is more intune with their feelings) but i've seen estjs cry occasionally... in public... over baby things... so they aren't actually that tough, although it can depend on the estj.
the brittleness that results from the two above points means she's stj. at least that's my reasoning.
teachers lover her
she's driven, diligent (she ain't no ntp)
her value of correctness in details such as dot the i's and cross the t's indicated S especailly ST, because letters are like objects.
giving harry and ron diaries for christmas is very estj-like control and is assuming.
i might only tend to think istj is ebcause she so used to spending time alone. although estjs can do that, especially when compared to EFs. i knew an estj loner... she was that annoying. sound like anyone i've been discussing?
she's a very intelligent estj, me thinks. it annoys me when i read people's notions that suggest intellectualism and IN/NT can't be seperated.