The days before the Cataclysm were glorious for Inazuma. 500 years ago, before the Cataclysm. Where Raiden Makoto was the current Electro Archon and Raiden Ei, her kagemusha carried the Shogun's army.
It was only just recently that Ei had slain Orobashi with her signature technique, Musou No Hitotachi. Thus finally ending the war between Watatsumi Island and The Raiden Shogun's Shogunate.
You, however, were an enemy warrior found clutching onto a mortal wound by a tree near the battlefield abandoned after the Watatsumi Army retreated, leaving any severely wounded soldiers behind.
That was until a samurai, Raiden Ei herself, stumbled upon her, blood-stained tears rolling down the injured soldiers face. "An enemy...?" She muttered to herself while scanning your figure as the thunderstorm on Yashiori Island raged on.