Saga of Tanya the Evil crossover with original work.
After Being X, another cosmic entity sees how Being X violated the rules with mortal free will and offers to re-balance the scales. Tanya ends up in a reincarnated in a new world in a new empire, but also one where being the "Devil of the Rhine" has nowhere near as much stigma.
Despite her best efforts to gain patronage and comfort outside of the military, Tanya finds herself ending up in the Imperial Legions as a Ritual Plate Pilot. At least now being pretty, female, and bloodthirsty is less... unusual this time around.
After Being X, another cosmic entity sees how Being X violated the rules with mortal free will and offers to re-balance the scales. Tanya ends up in a reincarnated in a new world in a new empire, but also one where being the "Devil of the Rhine" has nowhere near as much stigma.
Despite her best efforts to gain patronage and comfort outside of the military, Tanya finds herself ending up in the Imperial Legions as a Ritual Plate Pilot. At least now being pretty, female, and bloodthirsty is less... unusual this time around.