East Blue, Cocoyasi Village.
"Kane, are you heading out to sea today?"
An elderly woman called from the doorway of a butcher shop. The young man she addressed turned his head slightly, revealing a tall, lean figure nearly two meters in height. His features were striking sharp and composed, his expression calm yet distant. A loose strand of black hair slipped from the tie holding his dark locks back, brushing against his pale cheek. He wore a long black coat adorned with a symbol resembling a ping-pong ball on the back, and a pair of worn brown gloves covered his hands.
But what stood out most were his eyes two deep violet orbs, patterned with concentric black rings. They radiated a quiet, dangerous mystery that made even the most seasoned villagers instinctively lower their gaze.
Kane Uchiha offered the old woman a faint, polite smile and nodded before turning his attention back to the horizon.
He didn't truly belong to this world. In fact, he wasn't even from this universe. He had once been an ordinary orphan from a planet called Blue Star a place where stories like Naruto were merely works of fiction. Fate, however, had rewritten his story, thrusting him into the world of ninjas as a member of the Uchiha clan.
In that second life, his parents had named him Kane Uchiha before dying on the battlefield. Drawing upon memories of his past life, he befriended Minato Namikaze and, after years of relentless training, mastered the legendary Flying Thunder God Technique. Confident that he finally possessed the strength to survive, Kane faked his death during a mission and disappeared from Konoha.
Living in secrecy, he exchanged information with Orochimaru one of the most feared figures in the ninja world. Through this dangerous alliance, Kane managed to merge Uchiha and Senju powers, awakening the fabled Rinnegan eyes said to belong only to the Sage of Six Paths.
Yet, in the moment of triumph, betrayal struck. Orochimaru attacked him without warning. Wounded and desperate, Kane exhausted his newly awakened power, triggering an unstable space-time jutsu. The world twisted and darkness swallowed him whole.
When he opened his eyes again, he found himself on a small, unfamiliar island. His body had regressed to that of a six-year-old child. Panicked, he examined himself. The Senju cells he had painstakingly integrated were still there, and his Rinnegan remained intact though his power had weakened significantly due to his regression and chakra depletion.
Having already lived through one reincarnation, Kane adjusted quickly. After exploring the island for a day, he stumbled upon a humble coastal village called Cocoyasi.
It was there he met a woman with red wine-colored hair and two young girls her name was Bell-mère. The memory struck him like lightning. Cocoyasi Village… Bell-mère… This was the world of One Piece.
Since he had already crossed worlds twice, Kane accepted his fate. The villagers were simple and kindhearted, though many were unsettled by his unnatural eyes. Only Grandma Lisa, the butcher, had taken pity on him a lonely child with no home and given him shelter.
He had lived in the village ever since, training in silence and waiting for his body to mature enough to harness the full power of his eyes. Ten years had passed in peace.
Now, at sixteen, Kane stood on the same pier where he had first arrived, his reflection shimmering in the morning sea.
"It's about time," he murmured. "My Rinnegan's true ability still hasn't awakened since that overload, but this body… it's stronger than before. The food here, the air, everything in this world it's made me tougher. The Senju cells have completely fused with my body. Guess even misfortune can have its blessings. After all, this world breeds monsters."
He clenched his fist, feeling raw energy surge through his veins. His heart pounded with renewed determination.
By his own estimation, without using any special abilities, he now possessed the power of a Marine Vice Admiral a formidable force, though still far from the likes of Admirals. But he knew that was only temporary. As his body grew and he adapted to this world's energy system, it was only a matter of time before he surpassed even his former self.
He looked out to the open sea. "Maybe it's time to see the world beyond this shore. The world of pirates and marines… maybe that's where I'll find the key to becoming something greater a true Sage of Six Paths."
This time, he intended to join the Marines.
Part of it came from habit. Back on Earth, he'd always respected order and discipline. While he wasn't naive enough to think all Marines were righteous, at least they represented some form of justice. Pirates, on the other hand most of them were no more than criminals hiding behind freedom. He wasn't a saint, but neither was he the kind of man who could watch innocent people suffer.
And there was a more strategic reason. By joining the Marines, he could study the world's power system firsthand and gain access to one of its greatest mysteries the Devil Fruits.
He had no intention of eating one himself. With the Rinnegan, he already possessed six chakra nature transformations. The power of the Logia fruits the so-called elemental types held little appeal. He had thousands of copied jutsu from his Sharingan days, so the Paramecia's versatility wasn't particularly tempting either. As for Zoan fruits, his Senju-enhanced body already rivaled mythical beasts.
There was no reason to burden himself with a Devil Fruit's weakness to water.
But one question intrigued him deeply could his Rinnegan's Preta Path absorb the power of Devil Fruits or even the ability of those who ate them? Could he use that power to evolve his eyes further?
That possibility alone was worth risking everything.
A sharp wind swept across the shore, carrying the scent of salt and adventure. Kane exhaled slowly, pushing those thoughts aside.
"Before I leave, I should go fishing one more time," he muttered. "Grandma Lisa will need stock after I'm gone."
With that, he picked up his fishing gear and walked toward the sunlit coast. His violet eyes glimmered faintly beneath the morning light eyes that had witnessed two worlds, countless battles, and the rise of legends.
Soon, another legend would begin.