Well like I said to the others about what's in the manga now. She has talked about potentially manipulating him yes multiple times. But up until now we haven't actually seen confirmation of her actually doing it. Like what we've seen is that she is for sure willing to do it, but we haven't actually seen a case of it, so it was entirely possible that simply she never needed to, though she was willing. There is also Akira's personality, as you said he keeps his word, so like even if he doesn't like something he still does it. Doing something he doesn't like for her isn't her manipulating him if he's aware of the repercussions of what he's doing, that's just him sticking by his decisions. Which is why I said the thing about the time compression and that he'd probably still learn it anyway.
But yeah that's why I wanted some actual proof that she was actually manipulating him, because 9 times out of 10, Aikra would just listen to her anyway regardless, so it's hard to tell what is his actual feelings on something and what was supposedly 'tricking him' unless we pull out something that is straight up with holding vital information about something like you pointed out for the things in teh future.
