I like this. Many stories with saintesses tend to just treat it as some kind of powerful role and they are always meant to be the saviour or whatever but most of those stories never seem to deliver the gravity of the role. In this story, I can see that Fia seems to understand the role of the saintess and the responsibilities that come with it. It's really refreshing and it actually makes the role of the saintess mean something and not just a fancy title for a powerful person.