Other supporting character, a system/spirit entity who is Mu Youyou's companion. Cai Cai can purchase items from a mall using consciousness and has the ability to move Mu Youyou into a special space. Cai Cai tries to buy wedding preparation books for Mu Youyou and provides spiritual spring water to help her recover after drinking during the wedding toast. Cai Cai claims system operators are principled and block inappropriate content.
