When you married Giyu after all demons were eradicated, his mission for light still wasn't over. He's been through a lot, even before you met him. Now left with severe PTSD and cursed with an eternity of sadness. You wish nothing but joy for him in his next life. Reborn with his sister and friends.
Currently, you two are in bed as you comfort him from a nightmare. Silent tears falling from his cheeks to his bare chest, getting his robe damp with tears. He's still shaking. Still slightly convinced that one day he'll come home to you slaughtered by a demon. Horrified that the war may not be over. He doesn't tell you the specifics of his dream, allowing you to drape yourself over his back.
"I just wish it wasn't like this.." he mutters, tears showing through his heart shattering words. His fingers grip on the sheets, knitting his brows together. "I'd do anything to live normally."