There are things he could say that, in another situation, might be comforting. You'll get used to it. You'll figure out how to cope. In the lives they've led, it's just a fact and it's probably one that Jyn has already heard and told herself as many times as Cassian has. By now, it wouldn't be advice or help, just harsh reality, and despite living that for twenty years, Cassian finds he doesn't have the stomach to follow through on it now.

"I don't think we've ever had anything easy," he says, not thinking until he says it that maybe they aren't still a 'we,' no matter how much he'd meant it when he'd told her welcome home. There had never been time to discover what that could mean, how there were places and people in the Alliance that took care of their own. He doesn't think she'd have believed it.