Xiao Z is a temporary system residing in Wang Ziqi's mind. Its full name is a long string of letters and numbers, essentially its factory serial number, which Wang Ziqi shortened to Xiao Z for convenience. It had been dormant for too long and lacked sufficient energy, so only essential functions were active. Xiao Z wants to find its original host and has been having ongoing internal conversations with Wang Ziqi. It provides commentary and analysis during the Lu family's discussions, once noting that Wang Ziqi had probably offended his brother-in-law before they even started getting along. It assured the Lu siblings that even when it regains full functionality, it will not report anything about their conversations.
