Ultima the High Seraph.

[Lunair]

Trimmed.

Oh wait. I went back just to check, and she WASN'T noted to be a rock, rather "an embodiment of pure ruination". The exact line is on page 200 of Encyclopaedia Eorzea Vol 3, and reads;

"Ultima, the High Seraph"
"So named for her ability to wield the ultimate form of destructive magic, the High Seraph was once nothing more than an embodiment of pure ruination. Yet, over time, the terror in which people held her shifted to reverence, and by a process not unlike the prayer-fueled creation of a primal, this worship quickened within Ultima a sense of self-awareness."

This directly suggests that she's only achieved the level of self awareness we see due to the collective beliefs of those aware of her. That said, what "an embodiment of pure ruination" actually translates to is vague as hell.

As for the thing about auspices and tural vidraal, I mention those cases because during a particular interview, it was asked why there're so many primals, auspices, kami, and so on in the far east when they were basically unknown in Eorzea, and it was stated that it was due to the regional beliefs in that area. they believe in these things, and so these things exist. it begs the question of how the original inspiration for the beliefs came to be, but does seem to indicate rather heavily that the auspices and similar existences fall into the same category, and the parallels between Tural Vidraal and Auspices gets mentioned in Dawntrail. (I'm looking for the interview to cite it, but trying to find a particular dev interview is always a pain in the ass, so it may take a minute so to speak.)

Also, while I WAS referencing the archbishop earlier, it was specifically prior to his transformation into Thordan that he tempered the Heaven's Ward, during the first time all of the Heaven's Ward were granted audience with him at one time. https://www.4gamer.net/games/199/G019924/20210810055/