Sources about the lore

[Elissar]

FF4 and greek mythology are your best sources for predictions here.

At least based on my limited knowledge, we don't have an organized encyclopaedia or something like that for EW yet.
However, you may find some clues about what they did in EW on encyclopaedia eorzea vol 1 and tales from the shadow.
Azem travels and Laha Phoenix you can find in Side Stories.


example

But then why had Elidibus approached me?
"Well...Azem went there, and is resolved to stop the eruption."
Naturally. I felt my brow furrowing, and fought to suppress a scowl that threatened to pull my forehead down over my eyes.
"How?" I eventually managed.
"You have heard of Ifrita, yes? The fire spirit?"
"Lahabrea's masterwork. An impressive concept, even for him."
“It truly is incredible,” the youth said with quiet fervency, the determined line of his lips curving into a grin. Generally, I found his ardent admiration for the rest of the Council endearing─if embarrassing─but at that moment, I was rather preoccupied with the implications of his suggestion. It's a wonder my brow ever recovered.
Ifrita. A manifestation of concentrated fire aether. I could see what Azem was planning: transform the volcano's aether into Ifrita, draw her away, and then destroy her elsewhere. This would safely disperse the excess. Of course, the plan required someone to procure the concept of Ifrita for Azem. But if that someone was not Lahabrea himself, who else could it be?

https://na.finalfantasyxiv.com/lodes.../#sidestory_07

[KurumiKanade]

Alright that's also good to know how about lore of races tho I think it's in the books right?