Typing the same things over and over on this blog has helped me realize things.
Yoshiro as the body of the Goddess and Soh as the spirit.
It's not that Soh is Yoshiro's spirit, as in the Maiden playing the role, but the spirit of the Goddess Yoshiro is becoming and Soh once was. Or perhaps Yoshiro has become the Goddess already and now must purify the land, but doing so defiles her. Soh remains the spirit.
The human sacrifice scroll...is the Maiden forfeiting her identity. Hence why I say these two are nameless.
Still many questions about why the cycle exists and how it began.