Sadly only a few of the selected characters did have a good personality and a backstory. Some of them were basically just there to be there (Maura, Chamo...) and you got to know almost nothing about them. How the characters do act is sometimes very weird and unreasonable and it gets really out of hand later on especially with Maura (what about all those Adlet, Adlet... She is acting so unreasonable in so many situations... If I were to take a guess I'd say she could be the "new seventh" later on but I can't and will probably never confirm that). The stars which got to shine were Adlet (almost a 10/10 MC if you ask me, really liked his personality and his ideals) and Flamie, and to a small degree also Hans.
Nevertheless, despite how dragging it became towards the end, the entire first half at least was really cool and interesting. It also had some good fights which were pretty exciting most of the time. If you ask me, even though it had problems here and there, the Anime overall was quite enjoyable and pleasant to watch. 6/10