@magicaldandruff if set in stone means marrying someone in specific. yes. we see a few panels about him talking about how he visited her as a bird. In the novel those few panels are more like pages and in different chapters lol. The prince actually get to have more depth as a character that we know now. Later on, he mentioned why he became who he became. He was always the same person but in the public eyes he got to be the playboy for the sake of his older brother. The older brother didn't quiet understand why the prince went that way but know that there are people who want to use the prince and wanted to dethrone his older brother and get rid off the current queen as well.
He will heal her in the future cuz the bastard of an emperor made her infertile and is planning to use that divorce her, toy her, and forbid her to live as a woman.