[Even now touch is not one thing that Soushi is very good at. And yet he allows this. Allows Kazuki to draw them closer because the last time he saw his friend, he had suffered due to assimilation. A fact of life that they had both accepted upon stepping into the Fafners months ago. It was the way they'd chosen to bring peace.
Maybe they both need this. Soushi hadn't been in a bad state but if Kazuki had woken up while they were away - he may not know that.
So he doesn't say anything about it even when the other doesn't grip him so tightly.]