Astronauts of the Future II

In my vision of the future where humanity has suffered great loss and consequently expanded into the universe, ethics is no longer as much of a concern as it is dropped or neglected in times or instances of necessity. As such, humanity can often turn to it's darker side in order to solve problems.

The astronauts I have in mind are no exception. They function as both astronauts and soldiers, a special caste of fighters that are raised from birth in order to have the skills they need by the time they are adults to combat the alien threat, specially trained to do so using hyper-advanced technologies specially suited for their profession. Sent out into space in cryo pods, they are awoken and briefed if necessary to take care of threats. Given how they are raised, they are incapable of disobedience and know only of the most effective ways to kill the aliens they are dealing with.

They are known as poltergeists, as their gear and training have them behave like ghosts that operate in the darkness of humanity's efforts to survive. Most of the public are not aware of the poltergeists existence and were created out of necessity. They wear a special suit of armour that allows them to survive in space and combat the aliens with far greater efficiency.

I take a lot of inspiration from Stracraft II in their design, from their characters known as Spectres. Whether they perform a similar or the same function I'm not so sure as my extent of knowledge in the game is minor, and they were more like parallels I could draw similarities to. As for differences, that can also be looked at. For example I imagine them being solitary space soldiers, whereas the spectres seem to be psionic or psychic to some degree, all abilities the poltergeists can perform come from training and technology.