Mass effect kantai collection crossover
Humanity had survived the Abyssal War, and althoe there were acathional scumishes with the remnants of the abissel fleet, they advanced into space, taking their ship girls with them.
On mars they found archives of a dead race named the Protheans and a new element called Element Zero. Even with this tech humanity never forgot the ship girls that saved them from extinction.
this is a challenge, the rules are:
Female ship girl shepherd
systems alliance tech must be unusual (e.g. particle or gauss weapons) or exotic (e.g. gravity weapons)
non turian first contact
ship girls are unique to humanity or at least at first