Part 2
He accepted the fact that his heart was locked away. He accepted that it was covered in ice, frozen for all time. He accepted the fact that he didn't really care what happen to anyone else. It was the way he could survive, the only way he could keep going after losing everything. He couldn't care about anything, because if he started caring about one thing, he'd start to care about everything. The only thing that could matter, the only thing he could concentrate on was his revenge. He would kill Zero for what that Longcoat did. He would worry about caring after that.
Except that look she gave he, as she sat in the back of the run-down truck, was burned into his brain. And her words echoed in his mind: "You're not a killer, you're a Tin Man." And something chipped away at his heart. He told her to take care of herself, and he surprisingly meant it. In the few short hours he'd known the kid, she proved to be much more than he ever expected. It wasn't until later, however, sitting in that same broken down truck, when he learned of her capture by Azkadellia, that he realized how big the chip in the armor really was, and how much he was truly coming to care about the well-being of one young woman.
He was never supposed to care again.