Considered by Qin Hai as the gentlest and safest of the six key subjects, but Xu Xingyuan feels No. 6 is the most dangerous one. No. 6 always says inexplicable things to Xu Xingyuan and insists on pulling him to serve some new God. When Xu Xingyuan passed the ward, the door had opened silently and the room was empty. Xu Xingyuan suspects No. 6 is hiding somewhere on the fourth floor watching him.
