It's perhaps overly sentimental and in another conversation, he thinks Jyn would call him out on it. This has gotten so raw and honest in ways they didn't expect and Cassian prefers to be serious, sincere. Dwelling on what can't be changed leaves him going in circles that eventually turn out to be a downward spiral. It's what tonight threatens to become if not for the choice he's making now, shaped as a promise to Jyn. Promising to believe her means promising to believe it when she says he's not a bad man. Or that she doesn't blame him.

She doesn't say anything in response but Cassian thinks she doesn't really need to. Jyn's never wavered in her assessment of Cassian. He's just the one who's struggled to believe it.

Somewhere, beneath all of the fears and worries, Cassian marvels at Jyn. It's the same kind of awe that he felt for her in Jedha, taking out all those stormtroopers on her own but now it's a quieter, more personal thing.

"I don't think it's a terrible idea," he promises her. It's his turn, maybe, to build Jyn up to try and believe what he thinks of her. "I think the fact that you're worrying about it and want to do right by them means more than someone who's completely certain in their abilities without caring." And Jyn has always cared so much more than she lets on, has ever been given the chance to show.