Defeating Nanamagari gives you 'Becoming the Spirit Stone Maiden' achievement.
Instead of getting an icon of Nanamagari, like you do with all other bosses, you get a cute little Yoshiro as the Spirit Stone.
It's called 'becoming the Spirit Stone Maiden' but in promotional ads, Yoshiro was referred to as the Spirit Stone Maiden already.
So, is it indeed a cycle? She is, was and will be the Spirit Stone?
Remember when I said that Nanamagari's plaque might be describing Cursed Soh?
I was wrong.
She actually absorbs the entirety of Nanamagari! Which means the previous Spirit Stone morphs into Nanamagari!
But in the true ending, Nanamagari opens up and drops out liquid defilement, which sparkles with white light fragments, that manifests into Cursed Soh.
Within its belly is not the entire spirit stone but the defiled maiden's spirit part of the spirit stone.
Hence why we see a 'Cursed Soh' emerge. Interesting that this happens but even Soh is surprised at this. Soh is the spirit of the Spirit Stone so to see this Cursed Soh is indeed odd.
Can we assume Nanamagari is the spirit stone and held in its belly is the power of the goddess the Maiden held?
In the Normal ending, Soh poofs away but can we actually assume she's absorbed by Yoshiro?
Or is it because Soh is actually an amalgamation of all the spirits of the previous Maidens?
The only issue is these translated lyrics aren't a direct translation because in the previous few frames, they don't translate the 'flower of defilement', which is integral to the plot of Kunitsu-Gami because the flowers are the Maidens.
The flower(s) of impurity is the defiled maiden who's become Nanamagari.
If we look at the stories of all the Seethe, many of them have backstories. Nanamagari's backstory is of the ritual. A sacrificed maiden then?
In the True Ending, Soh is the one who absorbs the purified Cursed Soh, which means she absorbs all the spirits of the previous Maidens, who were emanations of the Goddess, like she is.
She ascends to the heavens while Yoshiro remains as the Living Goddess, the Avatar of the Goddess Soh is....(speculating)
An entirely new goddess is born at the end. It's not the Mountain Goddess restored. What does this mean?
Another thought about Soh...
Messenger of the Goddess means emanation of the Goddess. Yoshiro is an avatar for the Goddess, this is why they're linked together.
Yoshiro has a magatama('curved bead') on her chest. Just embedded there. It's a design choice and not the necklace clipping.
I've read it might represent the human soul. Some say it can hold a soul and it represents rebirth.
Maga means curved. Nanamagari... seven curves...
So...7 Maidens? Or a Maiden, 7 times reborn?
I really am going in circles, huh?
Soh's health display and Cursed Soh's title card are different.