She's kind of easy to read, but Cassian has always been good at reading people. He makes a note when she softens to use his relationship with Bail too and hopes the man might forgive him for it.

Cassian doesn't react when she steps into his space; if anything, he leans in more and meets her gaze, looking downward with curiosity. She's trying to figure him out, much the same he's working on her. "I suppose I'll have to give you reason to earn my trust first, won't I? It would be presumptuous to assume I can just have it."

It's definitely got elements of a non-answer because he hasn't figured out what to do to earn her trust yet, except maybe become ride or die for her father. Which isn't happening. It's not even the answer he'd give if he was 100% being himself, but he's still working on what part of himself would get along with her best. "You can ask me things. That's usually how you stop being a stranger. But I would not be here without your father's approval."