Caretakers

The oldest or most advanced Caretaker A.I.s are called Alphas. These A.I. have gained true sentience and thus are granted a body similar to that of a human for them to have an option to interact or defend their children. Though with the clear signs that they are in fact robotic in nature, whether it is different color skin/plating, antennae etc, Though rarely seeing combat, unless their base is invaded, they have access to every piece of combat data and had years to practice it. The android bodies they are equipped with also allow them to escape from complete destruction by fully transferring their A.I. into the body itself. Due to how rare it is for an A.I. to evolve to sentience only circa 100 registered known Alphas exist in history and they are kept as far away from each other as possible. As per Skynet Law "Let's try not to kill each other. Each other being Humanity and themselves." Taking advantage of this separation a deal was struck to allow them to handle the charts for space travel and oversee Terraforming or construction on the planet/station they reside on.   Alphas are also very protective of the Betas, feeling that one could ascend at any moment so they ask that humanity respect them as if they were Alphas themselves. For lower rank A.I then betas they view them a similar aspect to pets.