He is like that is because of his Father and big part of it came from Leon/Leandros, the MC wanted to learn how to use sword but his father forbids it. Even Leon said it that the prince doesnt need to learn it because he would be the one to fight for him. To protect him. They didnt even want him to go outside of the Castle walls. Thats why he is a brat, if you analyzed it, it's not his fault for being that way. Even if his father is still alive all of his life he was abadoned and other turn their backs at him. But dont worry tho, I already did all of the paths, of the stories 🤣 and yeah he changed for the better of his people and kingdom. Well sometimes i get annoyed to Leon for being too protective instead of teaching the prince to protect himself. This is just my opinion tho. No hate 😊