For Duanmu Huai, the origin of this girl was quite a mystery. He still remembered that this was the Type-Moon World. Originally, Fiore's family wanted to move and then found a piece of land with a spirit vein, only to discover that the spirit vein had been intercepted. So back then, Fiore sought help from Duanmu Huai and Medea. When they went there to investigate, they found that it was designed by a magician into a self-operating spiritual base rock plate, and at its core was this girl sealed in crystal.
Then, when Duanmu Huai went to observe the girl, he was astonished to find that she was connected to Yog Sothoth, and Yog Sothoth was even attempting to descend into the Type-Moon World through this vessel!
