I was looking at this image again. How the defilement is held even within the symbol of the Goddess. When I went to translate the kanji again(祓: Purification), I came across a website that had a Japanese review of Kunitsu-Gami with spoilers.
A living Buddha! Interesting. It aligns with my idea of Soh as an emanation, because that's what she is. An emanation of the previous Maiden, sent by herself as the Goddess.
Yes, Soh is an emanation of Yoshiro. The previous Yoshiro.
But...a Living Buddha is alike to the Dalai Lama. If this is Yoshiro then reincarnation is definite and Yoshiro and Soh are one in the same, being reincarnated through different bodies.
A lot like the Avatar, yes? Aang is the Avatar but can speak with and receive guidance from his former selves. Except in this case, Yoshiro's former self as appeared to her as an emanation.
Could this explain it all?
I mentioned before the Goddess seems to move through bodies.
Yoshiro is a substitution for the Goddess...but we can actually say she's an Avatar of the Goddess as it's quite clear she's Divine in nature.
This might just be it...
So, not 7 individual maidens but 7 reincarnations...?