Their common traits were that they were young, beautiful, and none of them were beyond a certain age.
So, understanding this Evil Spirit's preference is straightforward. Clearly, this Evil Spirit enjoys consuming young and beautiful girls, and the courtesans from each establishment are its definite targets.
Given that, the task becomes simple.
According to Duanmu Huai's investigation, the most renowned courtesans currently in Jiyuan Youguo belong to Jingji House's Fern Princess, and Shiren House's Lixia.
In other words, as long as I disguise myself as a customer and redeem them, then the Evil Spirit will certainly strike before they leave the brothel.
