(Luna-IV) The Boar Princess
Related to/extrapolating from this: https://lawfulevilchao.leaflet.pub/3meznc3i4rc2a
The Boar Princess: https://gi.yatta.moe/en/archive/book/4/the-boar-princess
I'm rereading Boar Princess, and I think it might be about the dragons. If the turtle is the Hydro dragon and the fox is the Pyro dragon (because he advises the Princess to use fire), that lines up with the two dragons we know died.
(And also with Dragon's Bane, which buffs damage vs. Pyro and Hydro)
If the Boar Princess--who fed her kin, the fox and the turtle, to the wolf--is the Cryo dragon, then maybe this is saying the Cryo dragon switched sides in the war. It'd explain why she'd have the moniker of "Atonement", and why the Moon Sisters hesitated to take sides in the war and argued amongst themselves instead.
Then the squirrel sorceror could be the Abyss, and the wolf's curse the corruption of the Abyss.
But the wolf isn't part of the Boar Kingdom, so I'm not sure what it's supposed to be. (Phanes?) Past experience with corruption could explain the extreme fear of the Abyss Phanes had according to the Moon Sisters in Luna-IV.
I thought the snowstorms of old Mondstadt and Dragonspine might've been from the Cryo dragon dying, but now that I think about it, Dragonspine specifically was from the effects of the Celestial Nail... hm.
Discussion in the ATmosphere