It is, Cassian thinks, the consequence of a hard life. Kindness is rare and therefor untrustworthy. The woman in his arms is a perfect example of what that can do to a person, the toll it takes...

Cassian turns his head and looks at the television. Thinking about what kind of person Jyn might have become if life had been a little kinder to her is not a good path to take. It leaves Cassian envisioning a woman who is softer, happier and it's a disservice to the person next to him now. Whatever Jyn might have had–deserved even–she didn't get it, nor did Cassian. imagining otherwise was a cruel game.

"He trusted you more than the rest, at least," he says. It's a fact that they had abused to try and get a message that Cassian had almost been willing to disregard.