Through unknown methods thought to be related to clay sorcery, the Nnaki created humankind to serve them as loyal subjects.
In order to ensure that humans would not grow too independent and rebel against their masters, Nnaki made it so that humans could not reach physical maturity unless given a steady supply of certain alchemical solutions. This way, the Nnaki could ensure that only their most loyal servants would thrive.
To further ensure a loyal population of humans, nurseries were constructed to house immature humans. Within these nurseries, they would be speedily aged from infancy to adolescence via special pods. These children would then be raised and educated by Nnaki-built machines that used cult-like methods of indoctrination.
Based on some of the same techniques used in the creation of Messengers, these constructs are used to protect humans and indoctrinate them into worship of the Nnaki and their Hamashuu benefactors. They are vaguely humanoid in shape and take on a parental role within the nurseries used to raise humans. Attuned to all of the defensive constructs and monitoring mechanisms within the nursery, they are programmed to ensure that no human leaves the nursery unless they’ve been made fully dependent upon their masters.
As over the years the Nnaki have been forced back by wandering demons, many caretakers and their nurseries have been left without maintenance for decades. As a result, some of them have gone rampant, ruling over their human charges like gods. Others still continue to follow their original orders, sending out beacons with the intent of reestablishing contact with their masters.