To Fight the Aliens, I Became a Tribune

Philiya, a 13-year-old math genius, lost everything due to aliens. In order to avenge the blood, she joined Faust, using mathematical deduction as a bow and blood and life as arrows to solve the battlefield dilemma and transform from a recruit to a tribune. While resisting the invaders and uncovering Faust's secret, she gradually understood that true justice is not to kill many enemies on the battlefield, but to end all wars. Real name "Bloody Iris"