From the story and setting the series has similarities both from Attack on Titan and Demon Slayer, but finds some ways to deliver different ingredients to the mix. First of all what comes to mind is the great female character variety with the witches at the center of this world when in other shows you see an overrepresented cast of males to females ratio wise.
Some of the typical Shonen tropes are also put on its head when you consider that Manfasa the witch is more powerful than her guardian and can stand her own ground and only sometimes needs assistance. Some of her mannerism remind more of a man, so she doesnt act like a typical girl and bosses around her guard often.
Fafner the guardian has a unique fighting style with his sword and sheath, but seems a little overpowered at times. He goes through much change at the start and gets some fascinating philosphical ideas about how the safety system of the world should be. Natha the maid is also a good addition to the team with her knowledge of the world which translated into a convincing world building til now. Its also interesting that not much was revealed how Manfasas magic works only the dark story of how it came to be, so I see some potential in there which also says something about that the pace is right.
The artstyle is not bad, but not the best either but some of the villains look good I guess. The goal is set clear at the start without dragging on to much and you can see from there what to expect. Some elements from JRPGS could be found in here, but it doesnt have to be a bad thing.
The shady government is also part of the intrigue what opens up many possible conspiracies.