Bijuu Fusion (Naruto/Shadow Hearts)
Here's another plot bunny. This one combines Naruto with the PS2 RPG series Shadow Hearts.
The Hyuga clan of Japan possessed two powerful abilities. Any woman born to the clan was granted powerful divinatory abilities, which enabled them to locate the lairs of dangerous spirits. The men possessed an even greater power. The power of the Harmonixer.
Harmonixers had the ability to seal the souls of defeated spirits into their bodies. They could then fuse with those souls, assuming their shape and calling on their powers to help them in their later battles.
The clan was a small one however, and one day in 1915, the last son of the main line, Yuri Volte Hyuga, bearer of 21 fusions and defeater of the demons Amon, Asmodeus and Astaroth vanished without a trace while cleaning up the last of the aftermath of his battle with the cult of Sapientes Gladio. All that is known is that the spell he encountered would take him somewhere in time and space where he could be truly happy. Where and when that is, nobody knows.
What if, instead of the two choices he had in canon, Yuri ended up in the Hidden Countries of the Narutoverse? And then married and had a daughter, and she had a daughter, and so on, so that no Hyuga male was born until well after Yuri died? What if the first son born to that line after relocation was a boy named Naruto Uzumaki?
This would provide an interesting reason why Naruto can successfully contain Kyuubi while Gaara can barely contain Shuukaku. It isn't any difference in seals, it's the fact that Naruto's body was inherently designed to contain demons.
Things that would be of note with this starting point:
Harmonixers cannot use any special abilities other than those gained from their fusion souls, and those can only be used when they are in that fusion form. Their power in human form is spent entirely to contain those souls. Take this forward and Naruto has no chakra whatsoever unless he turns into a kitsune. No Kage Bunshins, no Oroike no Jutsu, no Rasengan, nothing.
If the Harmonixer has a weak will, the fusion soul can take control and start wreaking havoc (As Yuri proved when he first became Seraphic Radiance in Shanghai).
The first transformation can be triggered subconsciously by a life-threatening situation. Given Naruto's public image, this could cause problems.
There's also the issue of Malice. Harmonixers absorb Malice from the world around them naturally. If they don't purge it from their souls every now and then, it explodes from their form, turns into a monster, and the monster destroys things. As Naruto is hated by the vast majority of the civilians of Konoha and at the very least disliked by a sizable minority of the shinobi, this could be a serious problem.
And of course, there's how the Hyuuga clan will react when Naruto tracks down his family history and discovers that he is the heir to the Hyuga clan. Two bloodline-carrying clans with nearly identical names could be confusing.
Not many Shadow Hearts characters would be likely to appear in this. Roger Bacon and the Valentine siblings are all effectively unaging, so they could turn up.
The Hyuga clan of Japan possessed two powerful abilities. Any woman born to the clan was granted powerful divinatory abilities, which enabled them to locate the lairs of dangerous spirits. The men possessed an even greater power. The power of the Harmonixer.
Harmonixers had the ability to seal the souls of defeated spirits into their bodies. They could then fuse with those souls, assuming their shape and calling on their powers to help them in their later battles.
The clan was a small one however, and one day in 1915, the last son of the main line, Yuri Volte Hyuga, bearer of 21 fusions and defeater of the demons Amon, Asmodeus and Astaroth vanished without a trace while cleaning up the last of the aftermath of his battle with the cult of Sapientes Gladio. All that is known is that the spell he encountered would take him somewhere in time and space where he could be truly happy. Where and when that is, nobody knows.
What if, instead of the two choices he had in canon, Yuri ended up in the Hidden Countries of the Narutoverse? And then married and had a daughter, and she had a daughter, and so on, so that no Hyuga male was born until well after Yuri died? What if the first son born to that line after relocation was a boy named Naruto Uzumaki?
This would provide an interesting reason why Naruto can successfully contain Kyuubi while Gaara can barely contain Shuukaku. It isn't any difference in seals, it's the fact that Naruto's body was inherently designed to contain demons.
Things that would be of note with this starting point:
Harmonixers cannot use any special abilities other than those gained from their fusion souls, and those can only be used when they are in that fusion form. Their power in human form is spent entirely to contain those souls. Take this forward and Naruto has no chakra whatsoever unless he turns into a kitsune. No Kage Bunshins, no Oroike no Jutsu, no Rasengan, nothing.
If the Harmonixer has a weak will, the fusion soul can take control and start wreaking havoc (As Yuri proved when he first became Seraphic Radiance in Shanghai).
The first transformation can be triggered subconsciously by a life-threatening situation. Given Naruto's public image, this could cause problems.
There's also the issue of Malice. Harmonixers absorb Malice from the world around them naturally. If they don't purge it from their souls every now and then, it explodes from their form, turns into a monster, and the monster destroys things. As Naruto is hated by the vast majority of the civilians of Konoha and at the very least disliked by a sizable minority of the shinobi, this could be a serious problem.
And of course, there's how the Hyuuga clan will react when Naruto tracks down his family history and discovers that he is the heir to the Hyuga clan. Two bloodline-carrying clans with nearly identical names could be confusing.
Not many Shadow Hearts characters would be likely to appear in this. Roger Bacon and the Valentine siblings are all effectively unaging, so they could turn up.