>>106714179Eh, Star has magical powers, and more importantly, she has connections to people that are in charge.
That's what power ultimately is. Knowing powerful people who can do stuff for you, and having them do stuff for you because they value you.
Being a trusted advisor to Eclipsa, the girlfriend of the demon prince Thomas, a highly powerful quasi-member of the magical high council that monitors the multiverse and so on already gives her privileged access to things, and thus gives her agency.
Being a princess is just a cherry on the top, now.