Levi's frown darkens when the other boy touches him, but he seems to decide to allow it -- at least for a few seconds, or however long it takes him to rearrange his hands. He takes note of the new shape, memorizing it, then moves his hands apart and makes it again a couple more times to get down how it feels.

Then he turns toward the nearest firefly and catches it.

He leaves a too-big gap between his index and middle fingers, trying to get a look at his prize, and the firefly quickly wiggles back out through it, but he doesn't look too discouraged, shooting a short glance toward Erwin before trying again.

"...Levi." Just Levi.