I'm at least a little hesitant to make the jump from, "...you and yours, Warrior of Darkness." to there being multiple Warriors of Darkness. Me and mine have been working on Eorzea's problems this whole game, but the Scions aren't all Warriors of Light. It's possible, but Midgardsormr made it sound like it was a pretty big deal that we were Hydaelyn's Champion (not one of Hydaelyn's champions), so I've always assumed we were the only one. Unless multiple Warriors of Darkness are needed to beat us back (very possible), the and yours might just refer to his allies, whoever they are.