Cassian knew they were going to die. They'd done everything they could, but it was in the hands of the Rebellion, now. The thing was, he wouldn't have changed anything leading up to that point because they had done good. He could be at peace now. Only as he clutched Jyn to him, eyes closed against their inevitable destruction, he heard a voice in his head. Offering what sounded like peace to him. He accepted, thinking of all the ways he could contribute to a new civilization in the wake of his contributions to the Rebellion. He'd done all he could for his world, now it was time to help another.
Only, when the heat was gone, he was still holding Jyn. He could hear waves not to far away and the cry of seagulls just above them. After a moment, when he heard her clear her throat, Cassian finally opened his eyes. "No, no we're not," he agreed, sitting back on his heels so that he could look her over more critically.