Sundering and specific character questions. [Spoilers]

[Elladie]

I raise you my theory: The Twelve weren't Aliens, but just the Convocation Members befote being sundered. Not couting the fourteenth, and counting two Convocation members as one because Nald'thal is a twin deity.

I mean, I believe they say that the Twelve walked the planet before the First Calamity, which could be around the time of Amaurot. And those coming up with them being gods were the first generation of Sundered who still remembered a little, so maybe they just remembered some powerful figures/leaders and interpreted that to deities.

Alternatively, and purely going by Hades' name, seeing the Convocation members as similar to the Olympians. (Again not counting the Fourteenth and neither Hades, as he isn't one of the Twelve Olympians in greek mythology.)

Not sure why you say Hades isn't an Olympian, he definitely is. He is Zeus' brother along with Poseidon. The twelve Olympians are Zeus, Hades, Poseidon, Hera, Demeter, Hestia, Aphrodite, Ares, Apollo, Athena, Hermes and Artemis

[RenewalXVII]

Not sure why you say Hades isn't an Olympian, he definitely is. He is Zeus' brother along with Poseidon. The twelve Olympians are Zeus, Hades, Poseidon, Hera, Demeter, Hestia, Aphrodite, Ares, Apollo, Athena, Hermes and Artemis

Hades generally isn't counted among the Twelve Olympians, since he made his home in the Underworld, not Olympus. You dropped Hephaestus to include Hades in your list.