It's simple, on the expedition. Levi saved your ass...Again.
You sighed, you had gotten too reckless with killing Titans, you had ran out of gas and would of fallen to the ground below if it wasn't for the fact the raven haired man appeared out of nowhere, killed three Titans and then took you up to a tree and out of reach, not only that, you had the biggest rant off him about your stupid recklessness, you couldn't stay angry with him, he was right, you were too reckless on that day, normally you weren't but on today's expedition you were.
But then again, you did watch your friend Peter get eaten by a Titan, so that's what trigger the recklessness, even the ride back to the wall he continued to scold you on your stupid behavior today. You didn't pay attention to it much, so you nodded as if you listened to him, relief washed over you when the wall came into v