I predict that if Hermione’s death had come at the end of a long, complicated plot/investigation carried out by her, there would be far fewer complaints. As it is, she did not win anything other than Harry’s increased resolve—didn’t reveal any schemes, didn’t execute any of her own, didn’t discover any MacGuffins (as far as I know).
Vanishingly low-confidence idea: Hermione realized that the Philosopher’s Stone is hidden at Hogwarts, went to retrieve it, and somehow in there the troll got loose.
Evidence against: canonically, the stone troll and the bathroom troll were distinct, Snape went to guard the third floor corridor, the troll was pretty deep within the gauntlet in canon, meaning that if it was placed similarly in methods, something complicated happened off screen, and Dumbledore’s wards over the corridor would doubtless have alerted him. And it wouldn’t be much of a victory for Hermione, since the stone’s actual canon protection was the mirror of Erised charmed to give the stone only to someone who wanted it, but not to use it, and Hermione was seeking the stone to help pay off Harry’s debt.
Evidence for: In Chamber of Secrets, Hermione manages to convey information in spite of being petrified, which would probably have been found sooner had Harry/Ron been more observant. And even then, she managed to get petrified rather than killed, since she knew what to expect. And in Philosopher’s Stone, she was the one who figured out the stone was at Hogwarts (though, admitedly this wouldn’t have been as likely without Hagrid’s extremely loose tongue, but in MoR she was researching the stone last we saw of her).
So yeah, I could see Hermione having accomplished something off screen between chapter 87 and 89, but for now I’ll keep my confidence of this happening below 50% barring stronger evidence.
Vanishingly low-confidence idea: Hermione realized that the Philosopher’s Stone is hidden at Hogwarts, went to retrieve it, and somehow in there the troll got loose.
Evidence against: canonically, the stone troll and the bathroom troll were distinct, Snape went to guard the third floor corridor, the troll was pretty deep within the gauntlet in canon, meaning that if it was placed similarly in methods, something complicated happened off screen, and Dumbledore’s wards over the corridor would doubtless have alerted him. And it wouldn’t be much of a victory for Hermione, since the stone’s actual canon protection was the mirror of Erised charmed to give the stone only to someone who wanted it, but not to use it, and Hermione was seeking the stone to help pay off Harry’s debt.
Evidence for: In Chamber of Secrets, Hermione manages to convey information in spite of being petrified, which would probably have been found sooner had Harry/Ron been more observant. And even then, she managed to get petrified rather than killed, since she knew what to expect. And in Philosopher’s Stone, she was the one who figured out the stone was at Hogwarts (though, admitedly this wouldn’t have been as likely without Hagrid’s extremely loose tongue, but in MoR she was researching the stone last we saw of her).
So yeah, I could see Hermione having accomplished something off screen between chapter 87 and 89, but for now I’ll keep my confidence of this happening below 50% barring stronger evidence.