It was not by mortal hands that Prompto came to be in Insomnia. Or: The stars have a stake in the prophecy. Why shouldn't the Planet? Vague FFVII crossover. Eventually Noct/Prompto and background/mentioned Ignis/Gladio

While coming down from Mt. Ravatogh, Noctis finds himself flung across the expanse of existence, and finds himself in a world unlike any he knows. His only solace comes from the familiar face that greets him, although his journey home will be the hardest he's faced so far. SPOILERS FOR KINGSGLAIVE NOW IN CHAPTER 3! READ AT YOUR OWN RISK!