Raised Ire has always been a somewhat... contrary pony, to say the least. (Although really her parents should have expected that, naming her something like 'Raised Ire', especially in Equestria) However, when she actually gets a Cutie Mark in arguing, her parents judge that her contrariness has gone too far and resolve to 'cure' her of it by moving to the least irritable place in Equestria -- which is Ponyville, apparently; maybe they take it out on all the monster attacks? Or maybe the Harmony is contagious. Whatever the reason, Raised Ire's parents are convinced it is true, and are willing to drag her all the way there to 'cure' her of her attitude.
Hooray.
Rated Teen for mild swearing and such.