Jun Wu Yao's relationship with the Soul World was not bad then and even had some friendly relationship with the Spirit Tree. However, when he left the Upper Realm,he had ever so conveniently brought the seeds of the Spirit Tree along with him and that person that Qiao Chu and the rest had met with earlier was a soul of the Soul World. But it was different from those of the Spirit World where they could not leave the boundaries of the Spirit World. The souls of the Soul World were extremely pure and they had the ability to manifest a solid body, there was only one special thing that they possessed, it was their eyes!
No matter how similar the soul of the Soul World resembled ordinary people, their grey eyes revealed the fact that they were but a soul.