The spiritual body is the embodiment of the thinking of the sentinel and the guide of the crowd.
It seems to be the product of a universe in a higher dimension. With the help of the spiritual world of the Sentinel Guide, the spiritual body can exist in the physical world in the form of a specific animal.
A spirit's form reflects much of its owner's personal traits, but its true connection to the Sentinel Guides remains uncertain.
----"General Theory of the Mental Body"
Gu Lei is a mature, reliable and steady guide, but there seems to be something wrong with his mental body?