Shoujo to Neko to Ohitoyoshi Dark Elf no Maseki Koubou

Elle is a young girl who has been left alone in the world after her father disappears without warning and her magic teacher who took her place as a parent and brought her up has also died. A prodigiously talented magic stone engineer, she sets off on a journey to find her father with her partner, the cat fairy Yoyo, with a magic stone of her own making in hand. But the world is full of troubles that the naive Elle could never have predicted...