Disclaimer: I do not own Bleach or Harry Potter
Once again Harry was struck by the irony of his situation. For years people have been labeling him with countless names and unofficial titles.
Harry James Potter; The Boy Who Lived, Freak, Boy, Youngest Seeker in a Century, Heir of Slytherin, The Forth Triwizard's champion, Liar, Attention Seeker, The Chosen One, Undesirable Number 1, The Master of Death, And Champion of the Battle of Hogwarts, were just a few of his many given names among the general populous. This situation however was a first for him.
He long ago lived his life out to it's final conclusion, he even lived out... err well sort of lived out his afterlife as well. It took a very long time but he was tired of the afterlife. He was very much ready for the next great adventure. In this case, rebirth.
One thing hindered him however... the price.
Unknown to all those who live there is a heavy cost to rebirth. In order to live again a wizard must relearn humility and serve another. One who is specifically aligned with their very soul. Not a soul mate... that's still a different soul. No the other was actually a part of a wizard's soul. Though quiet the other half gave them strength and magic while they live. In turn the wizard gave their strength and magic to the other in Death.
Time meant nothing to this debt. Forward or backwards in time the wizard's soul would bind to the other half when service was needed.
Because of his choice to be reborn Harry was now bound to serve the other half of his soul. A savage that embraces almost all that Harry rejects. He revels in the fight, he enjoys the pain, he kills without remorse, he was all but insane, and he rejects all but the smallest connection to others. Harry's only consulation was he refused to kill those clearly weaker then him on a whim. He was in many ways the complete opposite of him.
It didn't matter his personal feelings. What did it matter that his wielder didn't need him? It was his duty to give his other half his strength no matter who he was. To teach him to align with him in order to discover his ultimate form. To defend and show him the very flaws in his half of his soul. He was quite literally his fighting spirit.
His other half however was making his job all but impossible.
Harry, you see, was a Shinigami's Zanpakuto and his savage wielder that went by the moniker Kenpatchi refused to hear his true name.
AN: This was actually a Challenge from somewhere... I just can't find the Challenge notice. Oh well... I'm not really planning on continueing this further. Just wanted to write out how that could even be possible. If I figure out a storyline I'll add on but for now consider this Fic complete.