Hello. May I ask you please stop getting into an edit war over who's a protagonist, deuteragonist, etc.? It's not confirmed nor canon as of late whether Jade is the first in importance and Roxie is the second, so I'd recommend you quit it.
Neither of the main characters are the certainal main protagonist. They all share it and that's final. Besides if one of them is the main protagonist of the series then Roxie would be that one. But she and her friends are main characters and share role of the main protagonist.