Gou Er

Gou Er was a resident of Mirror Village, until being killed by the Spirit Army.

Spirit Army Arc
Due to his playfulness Gou Er accidently touched the village's hidden soul seal. In the end, a large portion of his engergy got absorbed, leaving him in great danger. Afterwards Bai Shui Er left Mirror Village with the intention of of seeking someone to save him.

He is later healed by Cao Yan Bing, who agreed to help Bai Shui Er after meeting her. After Gou Er wakes Bai Shui Er tells him it was Cao Yan Bing who saved him.