This might become a chain of questions. Is there a power orb in the Auria Tower? I've driven myself insane trying to 100% it but there's this one floor (the one right after the floor with the save point) where I cannot figure out how to open a blocked door. The two floors after also have rooms I apparently haven't been in, but I can't figure how to get in those either. I just want to make sure I end up with 10 orbs by the end of the demo.
There's 10 orbs in the demo yeah?
You can go back to Sablee and Auria by using the pod in the very top right of the Rietti plains! It only appears after you beat the demo.
There are 13 power orbs in total! There is a secret in the bottom right room of the top floor where you have undiscovered rooms ^^
I also have a walkthrough here if you need it: https://www.patreon.com/posts/119207938