In spite of his apparent total indifference to this entire situation, Chishiya will actually elect to help evacuate the Hivawei children. He might be familiar to some of them because he’s been fixing toys in the market place and he has some experience dealing with frightened kids, so this seems like the most effective use of his time. His tendency to remain outwardly unbothered by stress might also be the exact energy needed to suppress any rising panic in the little ones. He'll be trying to keep them organized but distracted from fear in order to get them to where they need to be as efficiently as possible.
Thinking of the children