We need to keep going. It's a true statement, as is the look Wilhelm gives him which suggests he's here but also isn't. To keep moving is a coping mechanism - a survival mechanism Claude's all too familiar with, one in his own arsenal, and he's not going to protest it.

They do need to move. There's no guarantee this hallway won't close in on them, that the roots scattered around won't suddenly rise up just like the ones in front of the altar to capture them again. No telling whether it'll even take them back to where the others wait, and anxiety rises again as he thinks about telling them about it. Who else was in there with them? Who won't be returning back from the gore they'd left behind?

Keep going. Nothing to do but that.

"Alright," he murmurs even as Wilhelm's already continued on. It's only a few quick steps to catch up again back into the light cast by the flame, only a second's hesitation before wrapping an arm back around the teen's shoulders as they walk. That for what it's worth, neither of them are alone here.