In one Kunitsu-Gami trailer, it's said the Seethe attack Yoshiro to steal her power.
During the night, Seethe will make a beeline for her and ignore Soh. (save for bosses)
Batsu stole Soh's power in the opening after an attack on Soh weakened the pair.
The Seethe previously stole the goddesses power(the masks) but why do most of them ignore Soh? Why could only Batsu steal it? Because of his lore?
Unless it's because Yoshiro is the main body which houses the power. When Soh's power was stolen, Yoshiro was close by.
Soh wields the power of the goddess but can only do so if Yoshiro is fine.