I don't own Naruto or Harry Potter, sadly.

God of Death.

Prologue: Travelling worlds.

He remembered the day that had changed his life so much, the day he killed his rival and was killed by his own allies, in death he had found out that the title, 'master of death' wasn't as frivolous as he had first thought. And he had been abruptly told by one of the many 'death's that he was now the god of death.

Upon the revelation, memories rushed into his mind, allowing him a simple outline of his powers and such. After finally accepting his new status he was flabbergasted to find out he had no responsibilities. Nada, nothing, zilch. It took him an even longer while to come to terms with that.

Thus resigned to his fate Harry decided to simply learn anything and everything he could.

He soon discovered that each dimension and each world had a different personification of death and he was simply the ruler of them all. He was greatly intrigued by this, one world had 'soul reapers', another had 'shinigami', they called themselves death gods and they seemed like the monsters that would hide in a child's closet.

In every world he learnt, being reborn into the world of his choice, or simply going to the world as his true self and learning, anything and everything he could. He was after all immortal, and had thus nothing better to do than learn.

He had been reborn as many things, humans or animals, demons or spirits, but there were two things he refused to be reborn as: bugs or females. He was by no means sexist but he would rather not go through the life of a female, and bugs were creepy, that's that.

Over the centuries his true appearance had changed, but not vastly so, as a God he had no need for glasses and his eyes shone with power, not unlike the avada kedavra spell, his hair grew and continued no matter what he did to cut it so he decided to leave it be, luckily it had stopped before going further than his thighs, it was a deep raven black, flowing messily down his back.

All his scars had disappeared and his skin became ghost like, and in every form he had, right on his heart, the mark of the hallows could be found, in his true form it was black, but it could vary in colours for his many other forms.

Today he is just watching over one of the many worlds, this time the world is the world of shinobi, as he watches his eyes zone in on one of his most devoted followers. In the shinobi world he is known primarily as 'Jashin', sometimes all his names get confusing but he doesn't care much anymore. This follower was truly one of a kind, a mixture of darkness and beauty, like an embodiment of the seven sins.

He is powerful and immortal, a gift Harry had seen fit to give him as thanks for his devotion. Watching that world a dark smile comes to his lips. The years had changed him from his 'light' self into the dark entity that he now was. After all the years he had continued to dress in robes, if only because they looked regal.

His eyes glazed over in slight lust as he watched his follower perform one of his many rituals and he licked his lips watching him, he would go to this world next, he decided. In this world he would be reborn, but first, he would give his little follower a visit.

0-0-0-0-0

Kakuzu sighed as he watched his 'partner' finish one of his many rituals, sometimes the miser was surprised if the Jashinist didn't have a ritual for something, he faintly wondered how the fool actually remembered all the rituals in the first place.

After staring at his partner in an annoyed silence for a few minutes he spoke up. "will you hurry it up, you are wasting precious time and money." the miser growled out, but before the younger male could reply a voice interjected.

"I don't see why he should hurry, the ritual is very... satisfying." the voice was dark and powerful, both the miser and Jashinist turned to the voice, finding a short male. He wore odd clothes, that seemed like a huge black cloak that covered him completely. His face was mostly covered by dark unruly hair that flowed down his back.

Between the strands two ethereal eyes stared at them. He was petite and feminine, he would barely reach Hidan's shoulder in height. The two ninja stared at the powerful man, and Kakuzu couldn't help but be surprised at the silence exhibited by Hidan at his interruption.

"who are you?" the miser asked carefully and he watched entranced as a dark smile, if it could be called that, formed on the youths face, Kakuzu turned slightly as he watched Hidan rise from behind him and approach the male. And he watched in absolute shock as the immortal fell to his knees and bowed before the male.

A hand came from the odd clothes and touched Hidan on his head, stroking his hand through the male's hair, and Kakuzu watched in complete shock as Hidan near-melted in the boy's hand.

"You would call me Jashin." his hearts nearly stopped as the boy spoke, in answer to his question and Hidan's actions made sense, but another cold reality fell onto the semi-immortals shoulders. His partner's 'god' was real, and right in front of him.

'Well shit.' was the only thought that went through Kakuzu's head, as he had many times insulted the god before him. He resisted gulping and instead simply stared at Hidan, who was acting like a puppy being pet by his master and was he purring?

"I was bored and decided to meet my most loyal follower, as it is I am going to be reborn in this world, but I'm most likely already in existence here, so I will try to find you soon, my dear follower." and with a kiss to Hidan head Harry de-materialized.

I'm going to try to stick to the time lines but I will most likely bend it for at times for my benefit.