Primals, Eikons and something I still don't understand

[myahele]

We don't know what makes an Eikon different from a Primal just yet. It's confirmed that each Eikon is stored in a proto-Dalamud like structure for the purpose of harnessing their powers, at least.

It seem like primal Bahamut was as strong, if not stronger than each Eikon, so raw power might not be that distinction.

Since each Triad's name is based of off religion's creation mythology in real life then maybe that could provide a clue?

Excluding the real life reference to their names so far we know that Sephirot was the 1st Sacred Tree and he claims to be the "incarnation of life itself." Sophia is obsessed with balance.

[RahfaelFavinco]

It's confirmed that each Eikon is stored in a proto-Dalamud like structure for the purpose of harnessing their powers, at least.

The Triad, yes, but we have no idea when Odin was summoned. He might have had jack squat to do with the Allagans.

Wth regards to Odin: Sephirot's and Sophia's thralls needed to be killed like any Primal thralls. Presumably, without the thralls, once defeated, the Fiend and Goddess were gone for good. Odin seems capable of existing without any active worshippers besides the thrall on Sleipnir's back, and without any more belief than a vague rumor of a demonic horseman in the Shroud. Even when Odin is defeated and the thrall is killed...how does Odin survive until the opportunity to claim a new thrall presents itself? Does it have to do with the true form of Odin, the Zantetsuken blade, being an actual physical object? How does only one person's forced worship give Odin the immense power he has?

[Annana]

The Triad, yes, but we have no idea when Odin was summoned. He might have had jack squat to do with the Allagans.

The SMN relic quest mentions an Allagan Summoner who had Green Eyes and sacrificed herself in the fight against Odin so that her allies might defeat the Elder Primal.