You know I have been thinking about this for a while, but maybe Rosandra wasn't actually off about Argia's being an agent of the adversary. Or rather is not in league with the Stilladia [i]yet[/i]. There are a few connections here that lend to that.
>We know that in the thread #3 alter!argia's patron is the Stilladia and their relationship was cordial, at the very least, the Stilladia likes Argia and her soul.
>At the very very start of the quest, back at #1 thread we see the Stilladia choosing a soul to relive, and she decides on argia's soul, and it [i]glistened like the purest mercury.[/i] and that's a soul she looked at it fondly
>In that same #1 thread the Stilladia literally calls Argia "the Silver Knight."
Now obviously Argia thinks that because she can request sanctions successfully, that means she can't be connected to the adversary, it is that simple in her head, but Rosandra already dismissed that simplistic mentality, by addressing the existence of the cameo of saint Bragia, that Ansàrra can and does change her mind, not that Argia thought much of it (because she is a scatterbrain, bless her soul), it's not a stretch that Argia can be an agent of the adversary while simultaneously be allowed to request for Ansàrra's blessings anyway, because in the Stilladia's own words Ansàrra's still cares for her.

What I am trying to say is that I think Ansàrra is trying to guide Argia into becoming the Stilladia's knight, and Rosandra knows that or suspects it but she is struggling to understand for what purpose (ironically, neither does the Stilladia, that's how deep the 4D chess play goes).
basically my theory is that the silver knight = knight of the Stilladia, now if that will actually happen is a different story, per qm's words we have walked a different path, but I was wondering what the anons here think?