[As the barrier dissolves, Kamui takes a hurried step back. He can't properly sense this kekkai like he can the normal ones, and he doesn't want to find out what happens if the creator manages to blindside him -- or if whoever managed to blindside the creator manages to blindside him as well.]
[He'll be sure to notice Fuuma in a moment, but right now he's too busy tracking the descent of the kekkai's wall.]