AN: Haha! So I lied, because I'm having major writer's block for Kanda, and I already had Lavi all done, so I decided to upload this first.
Inspired by the fact that I can't recall ever seeing Lavi's Innocence evolve. It's rather short, but Kanda's will be extra long to make up for it! Enjoy!
III. Help me to do my job.
He does not evolve.
Through missions and years, his strength is only dictated by the results of his physical training. His Innocence is stagnant, his synchronizing levels never change- they do not rise, nor do they fall. The other Exorcists don't really pay attention, but the Finders and Science division notice, and they whisper about how his results are so consistent. They discuss how his Innocence doesn't evolve, as it should, with the amount of fighting and training he does. They run test after test for malfunctions in his hammer.
They conclude that it either just doesn't react to him, or his resolve to be stronger is lacking.
However, while his Innocence seems to not respond to his will, in reality, it always has.
He has told it to stay the same.
And when Lenalee's Dark Boots evolve, he asks it not to become a Crystal type.
He can't let it evolve to something so binding. He is the Bookman's apprentice, and will be the Bookman one day, so he cannot afford to become a Crystal type. The resolve needed is something he's not allowed to have, because he must be impartial. He must be detached, he must be an observer, only ever interfering with history if his records require it. He cannot be a history maker.
So he tells his Innocence to stay where it's at, to stay away from his heart and to keep it's distance.
It obeys, and never evolves.