What would have happened if Tanjiro was turned into a demon instead of Nezuko? Nezuko volunteered instead of Tanjiro to get firewood. Tanjiro turned into a demon instead of Nezuko... (NOT GONNA COPY THE MANGA ALL THE EVENTS WILL BE HALF MADE UP WITH NEW CHARACTERS!)

Our time has come. For 5 years, we prepared. We grew stronger. While you rested in your cradle of power, believing your people were safe and protected. Believing that you've beaten us but you were deceived, as our power of the Teigu's have blinded you. You assumed no force could challenge you. And now... finally we have returned. You were deceived, and now your empire shall fall