Levi Ackerman was strict, cold, a neat freak, and not to mention bossy. He snapped at anyone for even doing the smallest thing he didn't like

People thought he had no heart. But in reality, he had the biggest heart of them all. That's why he had to hide it, so no one would get close.

And he was good at keeping his distance from everyone else, until you came along. Not that he showed it. He was just as cold to you as he was to everyone else, he couldn't let you see what you meant to him