Hermione Granger

"Occulus Reparo!" — Hermione fixing Harry's glasses at Platform Nine-and-Three-Quarters.

Hermione Granger is a young witch and best friends with Harry and Ron.

Stone
Hermione is first seen at Platform Nine and Three Quarters where she fixes Harry's glasses after Ron fails to. She is Sorted into Gryffindor and becomes friends with Harry and Ron. She is revealed to be extremely intelligent and knows ancient runes. She is under the impression that Snape wants to steal the Philosopher's Stone, but it turns out to be Professor Quirrell (possessed by Lord Voldemort) in the end.

Chamber
When Hermione is bullied by Draco Malfoy, Ron attempts to shoot a curse at him, but it backfires and Ron ends up vomiting up slugs. Hermione kills the slugs with salt. Later in the year, she is petrified by the Basilisk and Harry and Ron question Aragog if he petrified Hermione, which he denies angrily.

Hermione is eventually cured after the Basilisk and the Dark Lord are destroyed, and she is reunited with her friends. She hugs Harry but awkwardly shakes Ron's hand instead of hugging him.

Prisoner
In her third year, Hermione gains a Time Turner from Dumbledore, and goes back in time with Harry to save Sirius Black and Buckbeak the Hippogriff. She plays an important role, as she helps Harry defeat Dementors as well. Her Boggart if revealed to be failure.

Goblet
In the Tri-Wizard Tournament, Hermione joins Harry in battling the dragon. She also falls in love with Viktor Krum and goes out with him. After Lord Voldemort's return, Hermione kisses Viktor passionately.