Benders and the Great Secret - Last Survivor

This is a side story to my good friend, T.K.A Halonen's Benders and the Great Secret. The character of Sanada Sasuke who appears in the series is my creation, so I decided I'd write a story of my own about his background. I do so in honour of my friend's work, not in an attempt to steal it. So if you're planning to murder me about using his story, turn away now and save yourself the trouble.