@twinklecake
> If magic lets you create people-machines, it probably lets you create something that can alter the central programming of said people-machines.
Except, said programming is embedded into the akashic engine, the thing that Leo specifically said is a secret that he can't understand no matter what. So he can't just simply reverse program it.
>Hell, barring that, just engineer your own death quietly in a corner somewhere with a note sent to the demon king about the McGuffin in your chest. Don't just befriend people and force them to murder you. That's not just crazy, that's just dumb and unnecessarily melodramatic.
It's not possible, the central core of the personality is to save the world, not to die. He's not even allowed to die on his own because that will likely lead to the end of humanity when there's no one to protect them. Same reason why none of the other DH series commited suicide, all of them can only die when they're killed in battle. The "engineering your death" is precisely what Leo is doing here: having a group of powerful people that stood on the opposite side of him to kill him.