Evaluation criteria:
Story creativity - refers to a certain level of originality that should be met in order to have the full evaluation. Does not have to be the most original thing ever, but shouldn't fall to common themes. Exploitation of natural resources is a fairly common theme due to its real world impacts. Stranded in an island is also pretty common, as it is one of the easiest ways to isolate the protagonists from the rest of the world. However, an entire nation of fairies built from nothing, and on top of that with a human Queen, is fairly original. 7 out of 15;
Story idea interesting - a rather subjective criteria, means how much I personally like the story idea. It is an opportunity for the audience to both understand fairies better and have the mediator influence their culture. Loses a few points due to little originality. 18 out of 20;
Internal coherence - means that the episodes, by themselves, as well as how other episodes connect to this one, have to make sense, according to their universe rules and past experiences. As this episode does not really connect with other episodes, that part can be ignored. From the start to the end, I didn't notice any major mistakes. It does not receive full evaluation because there are one or two minor internal incoherences. 24 out of 25;
Characters - refers to how much I like the characters. This criteria is rather subjective, because if I really like at least one of the characters, the evaluation will automatically be higher than half. And, of course, I really liked the characteristics of "The New Humanity", also known as the fairies. Of course, the could have been better used, but they're the best characters from the story. The only two other characters that appear are the mediator and her grandfather, both well developed in the episode. Loses some points due to not exploring some characters, being those the fairies from the beginning, after the opening has been played. 18 out of 20;
Episode, in general - means how much I personally liked the episode, using the previous criteria and my personal opinions. This is, in my opinion, the best episode in the anime, and it's a really well-played one. Doesn't receive full evaluation due to previous criteria. 19 out of 20.
Final evaluation: 86 out of 100, rounded to 9 stars.