Castiel shouldn't be hungry, and yet, he's found in hell he gets hungry again. He wouldn't normally show up to a breakfast, but it is free and he's been told there are newcomers. If he can help a newcomer, he will. The help he can give is more an explanation anyone could provide, but that's probably preferable to the demons'.

He takes one tray for himself and one for someone else.

He's about to set the tray in front of Negan, sort of a welcome gesture, and talk about fire and brimstone but like Dean, something catches his attention.

"John Winchester?"