Padme and Leia were "main characters" but never used "The Force" and lightsabers
. So it doesn't automatically mean that this new character would automatically = Jedi to some people, especially to the casuals. Star Wars hasn't had a female human Jedi and that will probably be the "big reveal" of the film if they don't blow it in the upcoming trailer.
Right now she just looks like Padme 2.0. right down to her actual looks Whilst Finn is being shown using the lightsaber, getting ready to fight with it and being positioned to look like the main Jedi. I expect the new trailer to show more of him doing that, whilst the girl is just shown using guns and her staff() to keep the heat off.