Choutetsu Taitei Tesura

The story follows Ichidaiji Hiiro, a merchant's daughter, as she takes the place of Scarlet Tesla — the princess of the Republic of Manchuria and granddaughter of Nikola Tesla, the founder of the Super Electric High School (超電磁学園) and inventor of the Empire, the main robot piloted by Hiiro and Scarlet— and fights against Thomas Edison and his army of 6 automatons bent on enforcing the Japanese Empire's will onto the Republic of Manchuria.