Yu could feel the tingles of actual fear going down his back at the thought of going beyond the wall. He trusts Makoto with this, in fact- he doesn't know a person better than him to have on the team. But... he doesn't really trust himself. He feels his powers wavering and he has to push that thought aside as Makoto comes in the view.

He waves back, returning the smile. "Thank you for this. I hope I am not bothering you with this request." Hopefully, this doesn't turn into a huge catastrophe instead of a training.