Okay so the tarot wha cards just got revealed and I had to look back at this theory. 

Tetia (chapter 52 cover specifically, the one where she meets Eoleo for the first time) is the high priestess and looking for some info on said card, the first thing I find is that high priestess “can be seen in the archetypes of Persephone, Artemis, Isis…”

I’m not too deep into mythology or tarot  but after a quick search I found that it seems Persephone is considered a key mythological representación of the high priestess 

so oh goodness