Harry already has (he would think) an ultimate lever: The breakout from Azkaban. If he so wished, he could inform Dumbledore and the DMLE and bring all the wrath of Britain down on Quirrell. It would mean incredible costs for Harry, but he could do it. Although, my mental model of Harry says that he would never actually do that.
Even as an occlumens, Harry could prove he and Quirrell did it. Harry has knowledge of Azkaban that no 10 year old should know. He can communicate with dementors to identify himself. He could recreate the rocket he used. Dumbledore can identify his patronus, etc. He’s also got a good chance of getting off without many repercussions due to being a minor under someone else’s influence and being the boy-who-lived.
Now, Harry doesn’t seem like the trust authority like that, but he could pull it off. Heck, even if Quirrell wouldn’t agree to help Harry, Harry could probably just lie and say Quirrell planned this against Hermoine and get this crime pinned on Quirrel if he really wanted to. I don’t think Harry would actually do this, but it’s a possibility. Harry has an untapped resource to save her that nobody knows about (Knowledge of the Azkaban heist), but he either wouldn’t think of it or he’d consider it not worth it.
Harry already has (he would think) an ultimate lever: The breakout from Azkaban. If he so wished, he could inform Dumbledore and the DMLE and bring all the wrath of Britain down on Quirrell. It would mean incredible costs for Harry, but he could do it. Although, my mental model of Harry says that he would never actually do that.
Even as an occlumens, Harry could prove he and Quirrell did it. Harry has knowledge of Azkaban that no 10 year old should know. He can communicate with dementors to identify himself. He could recreate the rocket he used. Dumbledore can identify his patronus, etc. He’s also got a good chance of getting off without many repercussions due to being a minor under someone else’s influence and being the boy-who-lived.
Now, Harry doesn’t seem like the trust authority like that, but he could pull it off. Heck, even if Quirrell wouldn’t agree to help Harry, Harry could probably just lie and say Quirrell planned this against Hermoine and get this crime pinned on Quirrel if he really wanted to. I don’t think Harry would actually do this, but it’s a possibility. Harry has an untapped resource to save her that nobody knows about (Knowledge of the Azkaban heist), but he either wouldn’t think of it or he’d consider it not worth it.
Harry also knows that Quirrell is an unregistered animagus.