How is Fx's dormitory allocated?

It turns out that Qiuqiu and Xiniu share a room, and Amir and Luna share a room. Crystal lives at home near the dormitory, but now Xiniu and Crystal share a room. Ball and Amor are in the same room, luna. Because every time the hotel comes out. Crystal and Xiniu walked out of the hotel together and took the bus together. The other three seem to have one room and one car.