[IDontLikeToPayTaxes]

Hermione has her magical flaws. She’s horrible at riding brooms. She had to be on a Thestral during the decoy operation. She can cast a patronus but as Harry says, “She always has trouble with that one.”

Good point. But in this book, Hermione comes to the rescue so often and so miraculously, Rowling almost made her a Deus Ex Machina device.

[CholeraJoe]

Hagrid nailed it during their second year when he said, “They haven’t thought of a spell that our Hermione can’t do.” She also brewed polyjuice potion during the second year. It’s supposed to be one of the most difficult to get correct.