It can sense wandering spirits in vicinity, separating its soul from its body in order to interact with them and help them on their way.
By assuming a position of faking death, its soul can leave its body. An attack from the soul is said to directly strike the target's soul.
When it lies down and pretends to be dead, its soul leaves its body and takes over. Its body is functionally dead in this state, but it will return to normal once its soul reunites with it.