I absolutely love your take on Rose! I feel like there are parts of Rose that will annoy the hell out of James and vice versa. For example, if she flipped out about the cleanliness of the Common Room, he probably rolled his eyes and ignored her. "Hey, do you guys hear something? Sort of shrill and annoying? WEIRD." But I also feel like they could potentially egg on each other's destructive tendencies, under the right circumstances. He 100% would have helped her throw parties at Hogwarts.

And if he were to run into her ex (who also would have been James's former teammate), he would probably oh-so-casually knock him into a wall. Sorry not sorry.