The Spirit Soul Race has two spirits in one body, resulting in Ye Gu and Ye Jie. They are connected and consider each other brother and sister. They can keep their two souls stable because of Spirit Shackle Mask(see Spirit Soul Race). This treasure also symbolizes their position as Spirt Soul Chief.
Ye Gu is the leader of the Night Regime and has absolute loyalty towards Jun Wu Yao. He is extremely powerful and will be cruel and violent if necessary.
Ye Jie has a very mellow and sweet personality, she is very shy and struggles to speak clearly.