Upon arriving at the Senju Compound, Kadoya found himself seated beside Lady Mito, sharing a quiet moment over tea. The elderly matriarch, serene and wise, seemed to genuinely enjoy the company of the young Uchiha.
Their conversation flowed naturally—soft, unhurried—ranging from simple topics of daily life to complex theories of sealing arts. Despite the generations between them, there was a surprising ease in how they spoke, exchanging thoughts and ideas like old friends.
Kadoya recalled a device from his otherworldly memories—the Omnitrix, a powerful tool that allowed its user to transform into various life forms, gaining their unique abilities without permanently inheriting their weaknesses.
The concept fascinated him.
Inspired by it, Kadoya envisioned creating something similar for himself—a device capable of sealing and accessing multiple powers at will, each selectable like entries on a dial. A tool that would allow him to wield incredible abilities without the burden of their drawbacks permanently.
To bring this vision to life, he needed a core strong enough to withstand and contain immense power. His sights were set on the Gedo Statue—the husk of the Ten-Tails, currently sealed away on the moon. Eventually, he knew, Madara would bring it back to Earth. If Kadoya could secure even a fragment of it, that shard alone might be enough to serve as the foundation for his personalized Omnitrix.
After all, if the Gedo Statue could contain the power of all Nine Tailed Beasts, then a single piece could be repurposed into a supreme storage medium. The real challenge would be to completely seal away the lingering consciousness of the Ten-Tails. If it ever awakened, even in part, it could attempt to take control of him.
He needed to ensure that if the fragment ever stirred, it would be bound so tightly it couldn't lift a finger against him.
...
Under Lady Mito's guidance, Kadoya began his training in Fūinjutsu alongside Kushina.
The red-haired Uzumaki kept her distance, eyeing him with thinly veiled irritation. She could tell they were the same age, yet the gap in their skill levels was already glaring. While she still struggled to integrate sealing techniques into her daily routines—frequently forgetting complex formulas, Kadoya had already taken his craft a step further. He wasn't just learning seals; he was inscribing them onto his own body.
Kadoya understands the importance of both Yin and Yang Release. Yin, the spiritual half—imagination, illusions, and Genjutsu—was typically strong among Uchiha. Yang, the physical—vitality, regeneration, strength—was a Senju trait. Kadoya wasn't sure if he had inherited the Uchiha's natural Yin affinity. He rarely used Genjutsu, so there wasn't much to go off of.
Still, he understood one thing clearly: balance was everything.
Unlocking the Mangekyou Sharingan would come at a cost. Each use would burn out his vision a little more—until eventually, he'd go blind. But if he could balance Yin with Yang… he could create something more. Maybe something similar to Yin-Yang Release.
By then, if his eyes ever got damaged, he could simply heal the damage before it became lasting. Basically giving him a pseudo-Eternal Mangekyou Sharingan.
That was his goal.
With the help of his Shadow Clones, Kadoya began carving intricate, crimson seals across his body. Inspired by his Golden Rule, and using his Photographic Memory, he modeled the patterns after the striking red markings of Archer Gilgamesh, embedding aesthetics into functionality.
At the moment, only a small portion of these have an inactive Yin Seal, placeholders waiting to be completed when he finally develops something like the Yang Seal to balance out with the Yin Seal. The rest were carefully layered Uzumaki formulas, designed not just for storage—but for adaptability. He still lacked a piece of the Gedo Statue, the core he needed for his envisioned device.
But that didn't mean he was out of options; Kadoya could turn himself into a living prototype of the Omnitrix.
Making himself a living weapon.
Kadoya raised his index finger in front of him—and with a flick of will, it burst into flame. His entire body followed suit, engulfed in fire. Yet, there was no pain.
"Amazing..." he murmured, watching the flames dance across his skin.
He closed his right palm, then opened it again, forming a flickering, unstable water shuriken. With careful precision, he brought his flaming finger into the water.
The reaction was instant.
Steam hissed violently into the air as heat clashed with water. The shuriken warped under the temperature shift, bubbling around his fingertip.
Through the boiling liquid, he could still see his finger, now glowing beneath the surface—flames still burning, but slowly losing strength.
"So that's the trade-off..." he muttered thoughtfully. "The Mera Mera no Mi's power lets me become fire, but water can still suppress it if it surrounds me."
Still, he grinned.
Unless his enemy specialized in Water Release, or wielded advanced water-based techniques, there wasn't much they could do against him now.
He was untouchable. A walking inferno.
His grin widened slightly, the corner of his mouth twitching with a darker thought.
Heh… I could burn down the Uchiha Clan now…
"Ahem!" Kadoya coughed loudly, shaking his head as if physically swatting his impulsive thought away.
He stepped out of the bathroom, steam still swirling behind him, the faint scent of boiling chakra hanging in the air.
Congratulations! Hidden Quest Complete: "Living Weapon: Act 1"
Reward: + Enkidu: Chains of Heaven
Kadoya: "!!?"
He paused just a few steps outside the bathroom, eyes flicking toward the glowing notification in his system.
Wait… Enkidu!? The Enkidu!?
His heart skipped a beat. Did he just get the actual, divine-grade, god-binding chains from the legends of Uruk? Did that mean he could actually chain up gods now?
With barely restrained excitement, Kadoya opened his inventory and checked the details.
And then, like a popped balloon, his hype deflated.
"Tch… So against normal people, it's just… really fancy metal chains." He sighed, scratching his cheek.
Sure, it was god-tier against actual gods, but for most shinobi—people who are basically superhumans in their own right—it might not be enough to restrain them fully.
Still, he couldn't help but smile.
"Umu! Enkidu is still best clay. Or, I guess… best chain, in this case," he said with a wry smile, equipping the divine weapon.
Closing his eyes, Kadoya focused inward, diving into his mental space.
The familiar objects floated before him: the Mera Mera no Mi, his three Plates, and his Zanpakutō. None of them resisted. They weren't sentient beings—no will, no fight. Not like a Tailed Beast.
Opening his eyes again, he resumed walking.
A soft clink echoed out as a golden chain emerged from his body, slithering like a snake and coiling around his left arm.
Kadoya smirked.
With a flick of thought, the chain vanished back into his body. Time to get back to training.
...
The rest of his day passed between studying seals with Kushina under Lady Mito's watchful eye, and surviving Tsunade's "lessons" in the evening.
"Are you trying to act cute with me? It's useless."
Tsunade said, throwing her fist down on Kadoya's head.
The punch created a loud explosion, creating a large spiderweb-like crack on the Senju training ground.
Kadoya's body burst into a flock of white doves flying away before gathering back a distance away, forming back into Kadoya.
"C'mon, brat, where is all of your fancy water style ninjutsu? You don't think a few bubbles could harm me, would you?" She teases, seeing Kadoya has just been avoiding her attack.
This is what is troubling him.
His Bubble Ninjutsu doesn't have much or any lethality; they are just created to annoy others. Right now, annoying Tsunade means an early grave.
Don't believe me?
Ask Jiraiya.
The poor dude annoyed Tsunade so much she beat him senseless.
Most of Kadoya's ninjutsu are to annoy others and to escape.
His Rasengan and Chidori still needed time to prepare and Tsunade isn't going to give him that time. He could rely on the power of the Mera Mera No Mi sealed inside him, but using it might reveal its power to the higher-ups.
Then it doesn't matter whether he is loyal to the Hokage's faction or is under the protection of Lady Mito. People would see him as the second coming of Madara Uchiha.
After all, the more powerful the Uchiha get, the more anxious and troublesome the Third Hokage and his assistant get.
Kadoya couldn't reveal his Ice or Flower Release to Tsunade either, and Enkidu will definitely get shattered meetingTsunade's superhuman strength.
"Fine." Left with no other option, Kadoya has made a decision.
He will become Tobirama Uchiha, by faking it till he makes it.
He clapped both palms together, forming his water shuriken, then infused them with his Hamon before throwing them toward Tsunade.
Tsunade widened her eyes in surprise, not expecting to see such a form of water chakra manipulation from a six-year-old.
She quickly performed the Substitution Jutsu, replacing herself with a wood log that the water shuriken cleanly cut through.
Kadoya widened his eyes, sensing the approaching chakra.
Tsunade stood there and raised her leg.
"Heavenly Foot of Pain."
"White Doves Disappearing Jutsu!"
Tsunade's foot slammed down at Kadoya just as his body burst into a flock of white doves flying away.
Tsunade pulled out a few shuriken, turning around and throwing them directly toward where Kadoya just appeared.
"Water Style: Bubble Capture Seal!"
Kadoya creates a massive bubble that quickly captures the shuriken Tsunade just throws at him, before letting the massive bubble float up in the air.
"Impressive, a mix of bubble ninjutsu and fūinjutsu." Tsunade said, first time seeing one of Kadoya's Fūinjutsu.
Kadoya's hand moved in a blur.
"Fire Style:..."
He began causing Tsunade, Mito, and little Kushina, who is skipping training to watch the match, all widen their eyes a bit, since Kadoya is known for his Water Style, not the typical Uchiha's Fire Style.
Seeing him using Fire Style is a bit surprising.
"Fire Fist!"
Bringing his right fist back with flame erupting on his fist, Kadoya swung his flaming fist forward creating a massive fire fist coming right toward Tsunade.
Everyone: "!!?"
Tsunade's hands moved in a blur before she slammed both palms on the ground.
"Earth Style: Earth Flow Wall."
Tsunade could only use ninjutsu to resist.
The dense fire fist hit the massive earth wall, which blocked the flame from hitting the Senju's houses nearby and sending the flame coming right back toward Kadoya.
Kadoya didn't do anything to stop the flame coming his way, as he just stood there before being engulfed by it.
Once the flame died down, Tsunade, Mito, and Kushina looked worried seeing the flame swallow Kadoya.
As the earth wall crumbles, "Kid! Are you-" Tsunade was the first to move; she rushed toward the burnt training ground, not seeing Kadoya anywhere.
"Rider Kick!"
Kadoya's voice rang out, and Tsunade turned just in time for Kadoya to kick her on the side with his foot infused with Hamon. The attack landed, sending Tsunade flying before hitting the ground and turning into a puff of smoke.
That's right, the Tsunade he had been fighting this entire time was nothing more than a shadow clone.
Using his acting skill, Kadoya fell to one knee, faking exhaustion.
His "Fire Style: Fire Fist" was not a Ninjutsu, but the power of the Mera Mera No Mi. The reason he called it that was just a cover-up, and besides, sooner or later, he would have to reveal his power with the Mera Mera No Mi.
So it's best to do it now, revealing only a fraction of its power, while making it seem like he just put everything into it to make the fire that big.
Tsunade's figure appeared at the edge of the training ground.
"Not bad, kid. I thought you could only defeat my shadow clone after its chakra was exhausted," Tsunade said to Kadoya with a smile.
She gently patted Kadoya's shoulder, and he almost lost his balance and fell face-first on the ground.
As expected of the violent Tsunade. Even ninjas like the Raikage weren't her match in raw strength.
"I didn't expect that you, at only six years old, would have this kind of strength. You're really a genius. I deliberately maintained the strength of my shadow clone at the Genin level," Tsunade praised Kadoya.
While he kept up his acting, faking his chakra exhaustion by sending most of his remaining chakra into his seal.
Lady Mito began approaching them, clapping her hands, while smiling at both of them.
"Very impressive, I didn't expect you to create such a powerful fire attack." She praised, causing Kadoya to blush a little while scratching the back of his head.
"It's really nothing to be impressed, Grandma Mito. I just used up all of my chakra and managed to land a lucky hit on Tsunade-sensei's clone."
Sending his is really a bit embarrassed, Lady Mito just chuckled. "Don't be too modest, child, you did quite well to manage to hold your own and defeat a Genin Level Ninja."
Unable to detect the true meaning in Kadoya's words, Lady Mito didn't suspect that Kadoya was holding back or hiding his true strength.
After all, he did have more powerful Fire attacks, he did use all of his chakra sending them all into his seal, and he really didn't expect his "Rider Kick" to actually manage to take down Tsunade's shadow clone.
So technically he didn't lie to them.
They just understand his words in their own way.
"How about it? Are you interested in graduating now? I can talk to the Third Hokage and take you as my student," Tsunade said excitedly.
She said before ruffing his hair only to see his ahoge poking back up, seeing this she ruffed his hair again only to see the ahoge stood back up.
"No thanks. And please don't try to pull it out." Kadoya said knowing that even if he tried to run, he couldn't outrun a Jonin-level Tsunade.
"Look at you, acting like a good boy. You really are just a little brother." She said with a smile, ruffing his hair even more.
While standing a distance away. Nawaki glared at Kadoya with a jealous and angry glare, seeing his family being so close to the Evil Uchiha.