
Originally Posted by
Gemina
I don't think they are former members of the convocation, or the rogue group the sided with Venat. Though the latter does hold some weight. They swear up and down that they are not Primals, and are gods true. Their existence did not come about through prayer, and crystals. Records of their worship go back to the the third astral era, but due to more primitive eras prior and other calamities taking place; it is not only possible, but likely that sightings and encounters took place even before that.
After the sundering, and before the first successful rejoining of a shard, there was just kind...nothingness. A time when Hydaelyn, the source and all 13 reflections were perfectly intact. Azeyma referred to us as their children, giving implication that they did indeed exist before man. It is possible that they came into existence during that gap before any calamities took place, and before losing the 13th to the void.
My thoughts wander on if they existed even before that. Before there was a Venat to even become Hydaelyn. They are aware of Hydaelyn, and also that the last of her aether has been dispersed. I don't think that Hydaelyn and Zodiark being destroyed along with their sudden appearance is a coincidence, but we are definitely not supposed to know why they have chosen to do so at this time. Seeking battle with Hydaelyn's champion is a little too obvious of a motive.
Also, it's very interesting to know that when bringing up the twelve that was summoned and who Gaius refers to in order to seal away Bahamut and protect Eorzea, they were just kind of like, "Yeah, sooooo that wasn't us..."
Also, Byregot taking the form of a Spriggy is so very fitting.