Neither of them have known much in the way of hope during their lifetimes. That's one of the things that made the prospect of a better Panem so hard to comprehend. Any hope that she's had previously has always been dashed. Why would it be any different here? They both know better. The difference is that Prim remained someone kind while Katniss had grown cynical and code.

She frowns again when Prim mentions Zatanna. It is like her sister to care more about others than herself. Just once, Katniss wants Prim to be more selfish. She wants her sister to take care of herself and stay safe.

But it looks like Prim's done talking about her mission. The change in subject leaves a little to be desired. Maybe she should mention Derek to Prim. Or at the very least that she has someone to look after her when the nightmares become worse. Instead, she stays quiet on that and addresses the question at hand. "You probably know. I never sleep well anymore."