I would have given this show a lower score if it wasn't for Phosphophyllite's development. Phosphophyllite was seemingly your typical energetic, innocent and quirky protagonist. Luckily her development had her stand out from the Atsuko Kagari's of the anime world. The lack of knowledge of the lunarians adds a sense of horror and mystery to the creatures. I thought the aspect of losing your memory when a gem loss of piece of themselves was dumb and added no sense of weight or fear when that occurred. Finding out that information felt very anti-climatic but after seeing Phosphophyllite's personality do a whole 360, my feelings on that info definitely changed.
The animation in the show is downright gorgeous. This is 3d anime done right! This is one of the few animes were I actaully get excited for fight scenes. The show uses them sparingly making them making the viewer more eager to watch them. Fight scenes, especially in shounen anime have become very boring and overdone. Seeing anime boys fling their swords around can get dull overtime. Who knew abusing the camera angles can make fight scenes so much more engaging.
Though the anime ended on a cliffhanger and probably won't have a season 2, it still felt very satisfying. I wish people could pause their hyped up seasonal shounen and watch something new and refreshing.