A Shadow of a Shinobi {Naruto/Spirited Away Fan Fiction}

Zen doesn't care. Zen isn't seen, Zen isn't heard. Zen may not even exist to it's knowledge. Zen is just an academy student training to become a village weapon known as a Shinobi. How will that be possible when nobody remembers it? {Naruto Fan Fiction, a little cross over with, Spirited Away}