That stench is indeed worrying. While his nose is nowhere near as sharp as Ienzo's, he's gotten quite familiar with the scent of Ken's darkness...and as he looks at the boy, he confirms his suspicions. It doesn't look the same as when they first met, but the darkness around his heart has deepened since the start of this mission. He takes the coat in one arm, the one where his sleeve is covered in punctures and small tears, and reaches out with the other to grab Ken by the shoulder.

"You don't plan to run off on your own in that state, do you?"