After being captured, the rat realized that these people only wanted to lock him up and did not intend to do anything to him. After a while, someone came to look for the rat.
When he saw someone come to look for him, he was nervous for a while. After a while, he realized that this person was just here to chat with him and did not want to do anything to him.
This person was the negotiator that was sent earlier. This person was supposed to negotiate with Nezha, but Nezha ran away in the end. Moreover, Nezha could be considered working with the Pioneer now. There was no need for him to negotiate with Nezha anymore.
However, since he was already here, the Pioneer could not let this person come here for nothing. They would let this person stay with Chu Ze and brainwash the demons after they were captured.
This person knew all the information about this mythical realm, and he even knew about the nomological power.