One was an ordinary mobile phone that was half the price of a kidney machine, and the other was a cheap dust plug bought from a roadside stall. The combination of the two produced a shocking reaction, tearing apart time and space and throwing Youen into the cruel world of hunters.
With such a beginning, how could there not be Mary Sue's development? In FF7, Liza's sword of destruction came with her, and a strange power matching the destruction suddenly appeared. Then she vaguely accepted a fox bear as a novice wet nurse, but Youen is a commoner, without a super high IQ, and does not believe in the protagonist's law. There is no surprise in this.
Looking around the vast crowd of hunters, where can they find a place to stay? Let's face it, survival is really not easy.