The Ahai believe their mortal enemies to be the Enki, a robotic race that sacked the Ahai homeworld millennia in the past. Fear of the Enki drives much of the Ahai culture, including their nomadism. While details have never been confirmed, there have long been rumors that the Ahai first contacted Humanity to protect humans from the Enki.
There is insufficient data to know the Hetarek perception of the Enki, although vague references to a race matching the Enki description have been found in recovered Hetarek files.
Humans have never seen the Enki, and the official position of the Free Human Council is that the Enki are a myth.