-Sothis is an otherworldly alien being who DID come from far beyond the stars. Her lifespan is unfathomably long compared to an average human’s (if not just infinite/indefinite. I imagine as long as her home star shines she could live forever) and her godly power is basically like. An average human’s ability to wield magic times one bajillion. Naturally just has More Magic.

-She left the rest of her kind behind to visit earth and settle there but she doesn’t talk very much about her life before earth to anyone even her closest family. She greatly prefers life on earth and forming human connections to… whatever was going on back on the blue sea star.

-She created her children not by giving birth but like the games said . With her blood. She can just sculpt a human form from Anything, press together a crest stone, and blood-let on it a little bit, and badda bing badda boom new Nabatean. A Nabatean’s abilities, dragon form, and personality can be influenced by what she created their vessels out of. The first ones were created from the clay and mud of the earth she landed on hence the name Nabatean meaning earth dragon lol.

-Sothis DID love and want to watch over humanity, despite not being omnipotent and all-powerful like the Church claims. Creating her children and living among them and humans side by side was sort of her way of expressing that love.

-Despite not claiming to be omnipotent and all-powerful, Sothis’s strange appearance and abilities lead the people of Fodlan to begin calling her a goddess and worshipping her, which she happily accepted and encouraged. The idea that she watches over all life from above and is the arbiter of every soul came along with the church after she died (and is not really true). During her lifetime, she was just worshipped and was the queen of Zanado

-Sothis can create and bring life to a Nabatean at any age/stage of life. Rhea is one of the few she created as a baby rather than a fully grown adult, and she raised her as her own as a result.

-Seteth and his brothers are one of many “batches” of Nabateans made as adults and as a result they aren’t nearly as close to Sothis as Rhea is/was.

-Specifically, Macuil seems to even resent Sothis as he mentions byleth “stinking” of her during his battle. I imagine he’s the eldest brother and resents her for seemingly “abandoning” him to watch his brothers alone when others like Rhea got centuries of her time, love, and attention.

-Nabateans are all created by Sothis and most of them view her as a mother or at least a distant family member/matriarch figure but unless specifically made by Sothis to be siblings (as Seteth and his brothers were. Made as a matching set.) Nabateans aren’t actually related to each other. Sothis travelled all over Fodlan and probably other parts of the world too and created countless sets of Nabateans based on all different types of people. She would often make a few sets/unrelated individuals at once so that her creations/children could have like-minded company.

-Flayn’s mom/Seteth’s wife was also a Nabatean but from another “clan” and therefore yknow not his sister. Rhea Seteth and Flayn only really see each other as family in 3h because they are the last of their kind and feel the need to bond together for safety.

-Seteth and his brothers were based on whatever the Fodlan equivalent of Celtic people is. Rhea was made as a baby for Sothis to raise herself and is made more closely in her image than most of the others.

-Nabateans DO age, but very veeerryyy slowly. Rhea was pretty young, about the equivalent of 19 when Sothis was killed and the war of heroes started. By the time 3H canon begins, she’s about the equivalent of 38-41-ish. Seteth is about 40 in human years too, though he’s actually much younger than Rhea because he was created after her but was created as a young adult. Flayn is the equivalent of 15. Was only like 12 when she was injured and fell asleep back in the day.

-Sothis’s body, like when she was alive properly, will never die/rot so long as the blue star shines. However, the other Nabatean’s bodies DO rot but again. Veeerrryyy slowly. It would take centuries before they’d start to smell off.

-Other Nabateans, especially ones created later who weren’t raised and taught how to use their power by Sothis herself are not nearly as powerful as she was. Rhea is one of the strongest and was raised by Sothis personally but even she can’t control herself and goes crazy if she overuses her dragon form too much.

-Rhea was able to create Sitri/the other failed mom vessels because she was taught how to by Sothis. Probably watched her create many other Nabateans. However, since she is not nearly as powerful as her mother (and was just reusing the crest stone of a dead woman), Rhea’s vessels are far more fragile/sickly and humanlike. Most of them died very shortly after being created from their bodies basically being unable to sustain themselves. Sitri was pretty sickly and feeble but she was actually the healthiest and longest living one