As for why Kamiya wanted Usamaru to go to the Tree Sea, the main reason was to provide an extra layer of safety for the living gathered there.
Kamiya had clearly informed the Granny of the Mountain that he would leave a few subordinates near the Yamanba Residence.
The Granny of the Mountain didn't care much and agreed nonchalantly.
Currently, the miniature old man's shadow bodies were active near the Yamanba Residence.
Kamiyagawa also reassigned members of the Spirit Vehicle Procession from the vicinity of Tokyo Metropolis to the Tree Sea, to coordinate with the miniature old man's mini actions.
The combination of the Spirit Vehicle Procession with Scouts was quite useful.
They were highly intelligent and capable of adapting to unforeseen situations.
However, there were also problems.
