If you haven’t already gone through the latest Final Fantasy XV trailer frame by frame, it’s possible that you haven’t spotted an interesting detail yet: an unrevealed female characters who has joined Noctis, Prompto, Gladiolus and Ignis. Who could she be, though?

There’s a theory that she is likely a guest characters who joins the group for a certain time to complete a few important missions. This could also confirm that the guest characters are able to interact in multiple ways with the group outside the fights: conversations, camping, road trips and so on. Previously, we have seen Cor fighting alongside the party but further elements haven’t been revealed yet.

The new unrevealed female character can be spotted in the latest “Reclaim Your Throne” trailer at 1.27. Final Fantasy XV releases on September 30, 2015.