This anime/manga could be resumed in one line.
"Do the simple but well made."
S-Rank Musume have a very simples RPG enviroment, nothing special, only stoytelling with a good quality and patience world building, unfortunately the anime had a "ok" animation, with some good animations on fight scenes but being only carried by the story.
The main characters evolving in this 12 episodes was very well made, you can see from the first to the last how Belgrieve changed a lot because of his daughter.
I think that the greatest point of this story it's that don't follow others "Adoptive father" animes/mangas, I'm very happy to see another story were I would't be angry with a "after so much years in the future they married" like UchiMusume.
Story : 9
Characters : 8
World Building : 10
VA's : 9
Animation : 6