Disclaimer: I don't own anything shown here below i.e. DC verse Smallville, BTVS
The Mighty noble House of EL krypton's greatest minds declared so by generations of eugenics.
She was Sin-E'aL an orphan, her parents killed by war her father a soldier, mother a healer. A very contrary mix for krypton.
E'aL wasn't her birth clan name it was her taken one given to her when adopted into the branch line of the EL family the cadet servant branch.
Only family could be trusted with secrets such as those the EL Clan worked on so orphans were regularly taken in.
Sin was a mere science research assistant of nineteen years. She was secretly eleven months pregnant.
The father was a man she met in a bar one night a lowlife, he wasn't worth being informed of her status as a soon to be mother.
As an assistant to Jor-EL, Patriarch of the EL family she knew of and believed in his theories of what was happening to Krypton.
The eratic shakes were the end of the world. so she had a plan to save her unborn child.
Jor-EL she knew in defiance of the council secretly making a light speed rocket ship and A.I. for his unborn child Kal.
It'd be one of the few ships to ever go at those speeds with the capability for passengers to survive the journey.
Sin's plan invovled the Stargate, portals made and sent to earth thousand's generations ago during the golden age of exploration
The Inhabitants of earth (humans) were in fact on Krypton known as the inheritors. Lab made colonists from a different stage of evolution.
The last remaining portal was sealed by Jor-EL recently. the High Council would learn of any attempt to use them via scanner
Those who travelled through the Stargate could be located by aura residue then automatically recalled. That! Was a fatal process.
Sin had a very dangerous plan, she would create and travel through portal at a dimensionally weak point.
One of the few places the exiles the original inhabitants of earth not only existed but still flourished.*
It had an exhuding counter aura the council tracking they would never find her child.
Three months later in Sunnydale Hospital a woman with no identification who called herself Sianne Ailes inevitably died giving birth to her child.
Sin had known she would die giving birth her body couldn't take the teleportation to infernal portal.
She would have recovered in moments had she left the portal radius energy output.
The problem was she and her child would have also been found by the council in those moments and it would of all been for naught.
Before she died Sin had two requests the cremation of her body and to name her child.
Alex (Alx) Ailes (E'aL's) was adopted two weeks later and his last name was redone to Harris.
We all know the story there it was the same until a certain Graduation road trip.
*It was the Kryptonian's who kicked the demon's off of earth and locked away the old ones, they needed a viable planet for their experiments.