Aloy is Artificially Created: Horizon Zero Dawn (Story)
Which means Aloy is Elisabet's second birth, clone or just like Elisabet's daughter but didn't come out of any woman's womb, she was artificially created and she is not happy about this but she will still do her job.
After coming out of the door, everyone thinks she is a Goddess.
Here Aloy tells them to go to Sun King Avad in Meridian to fight for humanity and to defeat Hades, where she will bring Master override.
Now after reaching Gaia Prime's ruin, Aloy here sees the intensity of that self-destruct.
Here Slyens also created his shop there, Slyens tells that 19 years ago when this explosion happened, he fought with machines to get here.
But he wasn't able to open this facility's door and now he will gain knowledge of this place through Aloy.
Here Aloy now sees the holorecordings of the alpha's, after world's life has been extinct in Jan 2066 when Ted Faro, Elisabeth and her team are the last remaining humans on this planet.
Everyone was sealed in this Gaia Prime facility, one day while making Gaia Prime one seiling couldn't close correctly. By which corruptors detect Gaia.
To fix this someone has to go to the surface, but this facility has a protocol that if someone go to the surface then the door will not open again for them so that swarm can't enter inside.
No one wants to go to the surface to fix the ceiling but it was then Elisabet who put on a shield armour and fix the ceiling then holo call them, tell them to complete this project.
Team says that they will find a way to get Elisabet back inside but Elisabet did not take any risk due to the swarm being close. She is going home is her last words.