>>56547864id say May in RSE.
>no personality, just super friendly >no specific goal >might give you a run for your money under cycling road if you're unprepared, that's it>quits her journey right at the midgame, never to be seen or heard from again, instead Wally shows up to test you at Victory Road>apparently because you beat her so many times, just gave up Blue is a ball busting cock sucker and beat you to even the champ room, Silver undergoes character development and persists even into the post-game challenging you, Barry is present for some plot events and helps you out and at least makes it to the late game and while one-note at least has a quirk, Cheren and Bianca also both undergo development and while Bianca did give up battling she found something else and the story told us this.
All the kids in XY have their own specific dream/goal/thing they like about Pokemon (except Shauna, but she got closer to being a romance interest, so that's interesting, and she gives you a starter at the end).
I can't say much about Hau or Hop... except that they were more present than May? but idk if that was a good thing.. I know Hau likes malasada, Idk what May likes... I know Hop wants to be like his brother, idk what May wants to be like...