We know Quirrel can't directly influence Harry with magic
We know Harry thinks that. We know Quirrell has let him go on believing it. We have some further evidence that it's true (e.g., the business with the AK in Azkaban) but it's hardly conclusive (e.g., because blocking an Avada Kedavra is an unusual enough thing that it might have weird consequences for reasons other than interaction between Quirrell's magic and Harry).
his mind being bent by Bellatrix to be less suspicious of Quirrel
Unless there was a lot of deception going on in the Azkaban section of the story, she wasn't in a great state to do anything so subtle the last time she and Harry were in the same place. If it can be done from a distance (which most magical things in canon HP and HPMOR alike apparently can't), why single out Bellatrix in particular? There are other powerful nasty wizards around.
It's worth keeping in mind that even if she's completely useless for any sort of mission, Bellatrix may still be useful to Quirrell, by providing materials for the spell to restore his original body. This was discussed shortly after she was broken out; the spell would be at its most effective if the ingredients used were the most powerful of their kind; not merely the flesh of a servant, but the most faithful servant, and so on.
No matter how much the story diverges from the original HP canon, it's still an option for characters to do the same things they ...
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 99, 100, and 101. The previous thread is at nearly 500 comments.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system.
Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: