For a second, Chikusa is quiet, simply taking in the weight of that hand on his shoulder. Even with Ken, they'd never been quite close like this. It's a strange form of comfort, and all he can do is take it in. After a second, however-

"...We're used to worse things than this. But that's with our memories. Without those..." They're just teenagers again, and even Mukuro must be getting worried, or frightened, or angry. Chikusa knows 'Ciro' had been.