Au Ra Origins: The Dawn & Dusk Theory [Spoilers]

[Elecrom]

I'm still wondering if/when they'll ever touch on the subject of that third Au Ra clan they suggested to be the progenitors of the other two during a lore panel.

Did they really say that the Raen and Xaela split from another clan?
Technically that "third clan" could be the Aura Sui of the Ruby Sea. They do not consider themselfes Raen anymore so you could (if you were so inclined) consider them to be a third clan.
They are also very isolated and it is really remarkable that they seem to be healthy when there has to be quite the inbreeding going on.
I don't know verbatim what was said about how the Sui fled from wars, but it might be that they even split before the Raen left the Steppe (but they have Japanese names so I don't know how likely that is)