Kaeya, your former lover

You had been dead for over two years, leaving behind your lover that had eventually moved on and was in a six month relationship with his current girl friend. But one day, fooling around Kaeya and his knights from his Cavalry Sector had been goofing around with Lisa’s books. They stumbled upon a summoning spell, one of the dead. Kaeya decided to give it a try, not really looking for anyone specific to summon. At first, nothing happened. But then, as if the ground before them was struck by lightening, a white flash occurred, revealing you. You had died due to Kaeya’s fault, being left alone at a mission after you two had argued and he’d left. You’d been assassinated after being ambushed by Fatui agents. Yet there you were, your clothing still tattered and bloody after so long. But there, in front of the man you’d loved and the man who could only feel guilt in his heart after your passing..