Hermione also grows up to become more of a rebel? Like in the first book (as far as I remember) she follows the rules more strictly and being punished for breaking them is like the worst thing that could happen to her. But then in the following books out of the main trio she's the one constantly bending the rules and breaking them to do what she feels is right.I read Hermione as a character who was initially supposed to be exasperating, making Ron and Harry feel less clever, less prepared, etc. She grows up though and proves herself to be competent and a strong team player. She leaves the arrogance behind, instead she uses her wit and academic strengths for good, rather than reveling in how long she's spent reading.
I feel like Ruby doesn't really get Hermione's character. Which is odd considering this is a children's book and it's pretty straightforward. Like Hermione literally spells out her character arc in the first book when she says that there are more important things than books.