It's pretty pathetic how much that simple gesture relaxes him. Bertolt nods, some of the tension bleeding out of his limbs, and for just a moment, he leans his head against Reiner's. Reiner is talking about the mission, and covering the back of his neck, and that means it's the right Reiner now, his Reiner, the warrior and not the soldier, and Bertolt is protected. From whatever might come at them, he is protected.

He perks up a little when they get into the part of town with all the trees, and Bertolt looks around a bit. It's familiar here, at least, like the Forest of Giant Trees, and he wonders what else this city has in store.