My lady, what is it you consider power to be? The strength to force someone to do your bidding? To follow you out of fear? 'Tis a corrupt power there that leads to discontent, rebellion, and war.
The princess has what a goddess despite all her power, and indeed perhaps because of it, in some ways may never know. The power to endear loyalty. If you can convince another to swear themselves to you of their own free will, despite all other options, then you have one who will walk to fires of hell and back for you and do it gladly. Because you have made them believe everything they do is their own choice. What greater power over another is that?