Her magic: Attack on Titan x magical reader

Hello! This is my very first Attack on Titan x reader story!

This is a story about a young girl, named (Y/N) (L/N). She and her brother Leo are magic users. (Y/N) who had inherited the powers of her mother, who was a great and powerful witch that could stand up against any deity or magic-wielding creature? Her brother Leo who had inherited one of his Father's spellbook, a spellbook that contains many spells that defend, attack and heal. Together with the help of the people in the survey corps and many others, they defend their lives and get closer to their goal of saving humanity from the creatures that are known as Titans. Will (Y/N) achieve her goal of saving humanity? Only fate will tell.