"...I need to go in there, byon." This seems like stating the obvious, so it doesn't explain the honestly agonized expression on Ken's face. "What about you, though?"

This may be the most openly distressed Chikusa's ever seen Ken, save for when Mukuro didn't show up at Kokuyo Land because he'd been captured by the Vindice. And Ken's not afraid to be openly upset over things.