"Your father would be proud," Cassian murmurs to Jyn. His back is hunched from pain and he is trembling very slightly, but his eyes are soft and calm. Jyn takes his hand in hers, her eyes reflecting the pillar of fire and dust rising up. They stare into each other's eyes for a long time, both realizing their deep feelings for one another.
As the fire comes closer, Jyn leans forward and wraps her arms around Cassian. He returns the embrace tightly. She buries her tear-stained face into his shoulder. For a brief moment, white-hot pain. Then nothing.
With a shuddering gasp, Jyn opens her eyes. She seems to be lying on a cloud. Everything around her is white. She doesn't feel cold, but looking down she realizes she is naked. There's nobody there, but in her mind she wishes for clothes. An off white undergarment and a soft gray tunic appear immediately on her body.
I'm dead, Jyn realizes. It doesn't scare her like she thought it would.
She's very happy. She doesn't remember anything about her life in the galaxy, not right now. She wanders around the white area, sometimes seeing pale figures clad in clothes similar to hers, or naked as she first appeared. She doesn't care either way. She's dead. Why would she? She wanders for a second. Or maybe it's an eternity. Jyn doesn't know.
Suddenly, she sees a familiar figure. He has tan skin and dark hair. He's wearing grey trousers and a cream top. She blinks curiously at him. He looks back. Then, after a moment, they both remember. Or they remember enough to recognize each other, to recognize their love, and to remember how they both felt whenever they looked at each other, whenever their shoulders brushed.
"Jyn?" Cassian says uncertainly.
"Cassian!" Jyn cries. She rushes over and throws her arms around him. He returns the embrace and they hug, just like he did on Scarif. The hug feels like it lasted forever. Maybe it did. Finally, they release each other and stare into each others eyes.
"We're dead, aren't we?" Cassian asks. Jyn nods, her hands cupping his face. He puts his hands over her.
"There were so many things I wanted to tell you as we sat on that beach," Cassian murmurs. Jon's not sure what to say, but Cassian understands. They're quiet for a while, then- Jyn wasn't sure who made the first move, but she doesn't care- they are kissing tenderly, his hands running through her hair, hers on his hips. They remain like this for a long time. Maybe if Jyn had still been alive, it would've been too long. But she was dead, and didn't have anything better to do, so she just kissed him. And he kissed her back.
And Jyn was happy.