One Piece: With Sign-in System

Baltigo, the Island of White Soil.

Sabo, now fully recovered, rushed back to Baltigo, Koala struggling to keep up behind him.

"Chief of Staff!"

"Sabo, Chief of Staff!"

As he strode through the halls, revolutionaries greeted him with deep respect, but Sabo paid no mind—his focus was solely on the person waiting inside the conference room.

"Sabo, wait for me!"

Koala huffed, completely out of breath as she chased after him.

Without hesitation, Sabo grabbed the door handle and threw it open.

And there, sitting calmly at the table, was Ron.

The moment Sabo saw him, a spark of excitement and joy flashed in his eyes.

"Ron! It's really you!"

Ron looked at him and smiled.

"Sabo, long time no see. I heard from Ivankov that you got your memories back. That's great news."

Sabo strode forward, the black coat draped over his shoulders shifting slightly, his signature top hat and goggles perfectly in place.

He grinned.

"Yeah… Two years ago, when I heard about your battle with Kaido, something in me finally snapped back into place. I guess I have you to thank for that."

At his words, a massive shadow loomed beside them.

It was Ivankov, the giant-headed Revolutionary, standing with his arms crossed.

"OHHH-HOHO! At first, even I couldn't believe it!" Ivankov nodded vigorously. "Ron appearing here in Baltigo? It was almost too shocking!"

Ron took a sip of his tea, his voice calm as ever.

"Yeah… I suppose this visit was a bit unexpected. But I mainly came to see Dragon. And, of course… to check on you."

Sabo's expression shifted slightly.

"Dragon isn't here right now. He left on a mission recently."

Turning to Ivankov, he asked, "Have we sent word to him yet?"

"Already done, dah-ling!" Ivankov answered with a dramatic wave.

"He's on his way back. Said he'd return alone ahead of the others."

"Should take about two or three days."

At that moment, Koala entered the room.

She stepped inside, scanning the space—until her gaze locked onto the man sitting at the table.

A young man in black, his eyes closed, his expression calm and composed.

Koala's breath hitched, and she reflexively covered her mouth with her hand.

"It's really him…"

The Traveler, Ron.

But Ron was no longer the unknown young swordsman from four years ago.

After shaking the world with event after cataclysmic event, displaying power beyond ordinary comprehension, he had now risen to a position where he could directly influence the tides of the sea.

He wasn't just stronger than the Warlords of the Sea.

He wasn't just stronger than the Supernovas.

Ron now stood at the same level as the Emperors of the Sea… and the Admirals of the Marines.

Among the Revolutionary Army, only one man could match him in standing.

Their leader… Monkey D. Dragon.

Sabo pulled out a chair and sat down beside Ron, still smiling.

"How's Kuina? Did she come with you?"

Ron shook his head.

"No, I came alone this time."

"As for her… she's probably still sparring with Rayleigh."

Silence.

Then—

"WAIT… WHAT?!"

Ivankov's jaw practically unhinged, his face a mask of sheer shock and disbelief.

"DID YOU JUST SAY SILVERS RAYLEIGH?!"

Ron nodded calmly.

"Yeah."

Sabo chuckled.

"Kuina's strong enough to cross swords with someone like that, huh…? She really is amazing."

Ron turned to Ivankov.

"By the way, I appreciate you looking after her while she was here."

Ivankov waved a hand dramatically.

"Nonsense, dah-ling! We didn't do much at all! If anything, she was the one helping us!"

…

Sabo led Ron to the living quarters that had been arranged for him.

On the way, Ron casually mentioned meeting Luffy in the East Blue.

Sabo's eyes lit up in excitement. "Luffy has already set sail?!"

"Yeah. I'd say… well, actually, he's probably already reached the Grand Line by now."

"Really… Time sure flies fast. Luffy's already old enough to set sail…" Sabo paused for a moment, a nostalgic smile forming on his lips. "Does he still go on about becoming the Pirate King all the time?"

Ron smirked. "Yeah. Same as ever. Still a fool."

Hearing this, Sabo stopped walking, his gaze drifting toward the setting sun on the horizon. Memories of Foosha Village surfaced in his mind. His eyes flickered with emotion. "Luffy… And Ace… Everyone has finally set out, just like we promised."

Sabo tilted his head down, adjusting the large hat atop his head, and muttered, "For the time being, I can't afford to leave. Otherwise, I'd really want to go see him…"

Ron, standing beside him, had his hands tucked into the pockets of his black coat. His dark hair swayed in the evening breeze as he spoke calmly, "You'll see him soon enough."

"…Yeah. I hope so."

…

After leading Ron to his room, Sabo hesitated for a moment before making a request.

"Ron… Would you spar with me tomorrow?"

His gaze was unwavering.

Even though he knew full well that he had no chance of winning, he still wanted to see for himself just how vast the gap between them was.

Ron looked at him, then gave a slight nod.

"Alright."

…

The Next Morning.

In a spacious training ground within the revolutionary army's base, Sabo and Ron stood opposite each other, preparing to fight.

Sabo, a master of Dragon Claw Fist, had honed his abilities over the years. His command over both Armament Haki and Observation Haki had reached an impressive level.

But Ron? He simply responded using pure physical combat—along with his own Armament Haki.

The outcome was inevitable. A complete, utter defeat.

"I knew he'd lose, but I didn't expect Sabo to lose this quickly…"

Standing at the sidelines, Ivankov stared at the battlefield, stunned.

Sabo was no longer the weakling who had been completely outmatched by Kuina years ago. His strength had skyrocketed over the past two years.

By now, even among the revolutionary army's elite commanders, few could stand against him.

And yet, in a head-on battle, he was crushed in mere moments.

Koala watched as Sabo lay sprawled out in a massive crater, panting heavily, while Ron stood at the edge, barely ruffled. Her lips twitched slightly.

"This… ruthless combat style…" she muttered. "Kuina described it exactly like this."

Ron, meanwhile, was analyzing the battle.

'Armament Haki, roughly at Level 5, second stage… Observation Haki, Level 4, also at the second stage… His martial arts foundation is solid… Strength and speed are decent…'

'Overall, his power level is on par with a Marine Vice Admiral,' Ron concluded inwardly.

Unfortunately, Sabo had yet to eat the Flame-Flame Fruit like in the original timeline. If he did, his strength could surge even further…

Perhaps even reaching Admiral-level.

Over the years, Ron had gradually constructed a power ranking system in his mind—one that classified fighters into distinct tiers:

Below Commander-LevelRear Admiral-LevelVice Admiral-LevelAdmiral Candidate-LevelAdmiral-LevelEmperor-LevelAbove Emperor-Level

At the very peak of the world stood the Admirals and the Four Emperors.

Having fought both, Ron could confidently say that the strength of an Emperor slightly surpassed an Admiral—but not by much.

A single Emperor, even Whitebeard in his prime, wouldn't be able to take on two Admirals at once.

However, the gap between an Admiral Candidate and a true Admiral was far more pronounced.

Take Doflamingo, for example. No matter how much he refined his Devil Fruit abilities, he would never reach Admiral-level.

The difference was simply insurmountable.

"…Damn it, Ron. You're ridiculously strong."

Sabo sat up in the crater, his clothes in tatters, every muscle in his body aching. He let out a wry chuckle.

The overwhelming power gap… it was just like when they were kids.

Ron, standing above, offered his analysis. "Your Dragon Claw Fist isn't bad, but your raw physical strength is still lacking. Unfortunately, building up that kind of strength requires years of training."

Sabo's expression grew serious. "Then… what should I do?"

"There are many ways to grow stronger," Ron said. "But for you, the fastest way… would be to eat a Devil Fruit that suits your abilities."

With the revolutionary army's vast network, obtaining a powerful Devil Fruit wasn't impossible.

The real question was—did Sabo want one?

"...A Devil Fruit, huh?"

Sabo's eyes flickered with interest.

Scratching his head, he sighed. "I have thought about it before… but I have no idea what kind of Fruit would suit me best."

A thought suddenly flashed through Ron's mind.

There was one particular Devil Fruit—one that, if Sabo were to consume it, would undoubtedly send his strength skyrocketing.

Perhaps, he could even break past the Admiral Candidate-level and step into the realm of true Admirals.

"The Rumble-Rumble Fruit."

Sabo blinked in surprise. "Huh?"

"…You mean that Rumble-Rumble Fruit? The one known as the strongest Logia?"

Even Ivankov's expression shifted slightly. "Wait, Ron… Are you saying you know where it is?!"

Ron nodded.

"The current user of the Rumble-Rumble Fruit is a man named Enel. Right now, he should still be on Sky Island, floating ten thousand meters above Jaya Island."

"Ten thousand meters above…? Sky Island?"

Both Sabo and Koala were visibly shocked. They had never even heard of such a place.

Ivankov, however, didn't seem quite as surprised—only a little disappointed.

"So the Rumble-Rumble Fruit already has a user… That means we can't get our hands on it unless the current user dies."

Devil Fruits didn't just vanish when eaten. Only when the user perished would the power reappear somewhere in the world.

That made acquiring one incredibly difficult.

Koala's eyes lit up with curiosity. "Then… what if we convinced this Enel guy to join the Revolutionary Army?" she suggested innocently.

Ron's expression froze for a moment.

"…That guy?"

He suddenly recalled Enel's god complex—his arrogant attitude, his overwhelming self-confidence, his belief that he was an untouchable deity.

Enel… in the Revolutionary Army?

Ron's expression turned strange.

That was just… impossible to picture.

However, now that he thought about it, the Sky Island's inhabitants were likely still suffering under Enel's tyrannical rule.

And wasn't the Revolutionary Army literally founded to help oppressed people overthrow dictatorship?

With a slight smirk, Ron turned to Sabo and Ivankov. "If you ever get the chance, you should visit Sky Island. Not just because of the Rumble-Rumble Fruit's user… but because you might find people there in need of your army's help."