Manga by author Carlo Zen

A young girl fights on the frontlines in war. She has blonde hair, blue eyes, and nearly transparent white skin, and she flies through the air and mercilessly strikes down her opponents. Her name is Tanya Degurechov, and she speaks with a young girl's lisp and commands the army. Tanya used to be one of Japan's elite office workers, but because of a wrathful god, was reborn as a little girl. Tanya prioritizes optimization and career advancement above all, and she will become the most dangerous entity among the Imperial Army's sorcerers.

Summary:In the early 20th century, a small republic found itself stuck between a kingdom and an empire - both of whom wanted to manipulate the republic to suit their own needs.In order to protect itself from both sides of the conflict, the republic created a small group of soldiers whose job it is to suppress revolution and dissent in any way possible. This is the story of the Opera House.