Very enjoyable demo! I really love the premise of MC having to figure out who the imposter is, with other plots and machinations spinning around in the background. I feel like I already know who the real prince is, but there could be a twist... so I'm looking forward to the release!
Since you asked for bugs: There was a misspelling of "fus"; there was also a (system feedback?) comment at the very top of the screen during Ron's second scene that said an image file was not found. (Looks like his sprite.) He also did not have a sprite for his first appearance.