Hullmetal Girls by Emily Skrutskie

Hundreds of years into the future, humanity abandoned Earth and embarked upon an interstellar mission aboard a cluster of ships which eventually became the Fleet. Fleet ships are policed and protected by an elite squad of mechanically-augmented super-soldiers known as Scela, who serve the whims of the Chancellor and enforce her laws (along with a rigid social caste system). Aisha Un-Haad is desperate to provide a good life for her younger siblings, but her deck janitor’s salary isn’t enough to cover her plague-infected brother’s medical bills, so the only option left is to join the Scela. Key Tanaka is a mystery, a near-perfectly blank slate with no idea of who she used to be or why she volunteered for Scela service, but fragments of memory pop up in times of extreme stress, and they seem to indicate that her current identity can’t be trusted. Can these two unlikely partners put aside their differences ... Read More