One Piece: Signing In as a Pirate Begins with Roger's Execution

"Rosinante, your intel is truly invaluable. If I hadn't intercepted it and arrived here in time…"

Karl sighed, his tone carrying a hint of helplessness.

"…your information might have doomed you instead. Honestly, how could you be so careless?"

Karl glanced over the documents Rosinante had risked everything to pass on. They detailed Doflamingo's upcoming whereabouts, urging the Navy to dispatch warships for a decisive ambush.

The intel also claimed that the Ope Ope no Mi had been secured and was safely out of Doflamingo's grasp. Additionally, Rosinante requested protection for Law.

But none of that mattered now. Vergo was dead, Karl had taken action, and Rosinante's role in the matter was effectively over.

"This was my oversight. I never anticipated Vergo would turn out to be a spy. Thankfully, he's been dealt with. Otherwise, his abilities could've posed a significant threat to the Navy's internal stability."

Rosinante sighed, gently patting the sleeping Law, who had dozed off now that the tension had eased.

"Karl, may I ask you for a favor?"

"What is it?"

"Please, take care of this child. I'm afraid that in the future…"

"Stop right there. If you want to look after him, do it yourself. I'm not your babysitter!"

Karl's tone was firm but tinged with reassurance.

"Don't worry. As long as I'm around, you won't die. Doflamingo is nothing to me."

Karl's confidence was absolute, but Rosinante couldn't help feeling uneasy.

Though he knew Karl was powerful, Rosinante had no real sense of the extent of his strength. Even after witnessing Vergo's defeat, he doubted Karl could take on the entire Donquixote Family.

Such doubts were born from Rosinante's limited perspective. As a Marine officer no stronger than a Captain, he couldn't fathom Karl's true power.

"Rosinante, tell me honestly—did Law eat the Ope Ope no Mi?"

Karl's sudden, quiet question took Rosinante by surprise.

After a brief hesitation, Rosinante shook his head vigorously.

"No way. I've hidden the Ope Ope no Mi. I wouldn't…"

"Don't lie to me. The truth will come out soon enough. Besides, his Amber Lead Syndrome can only be cured by the Ope Ope no Mi's power.

If you want him to live, it's best to explain everything to Sengoku directly. Tell him why you did it.

The Ope Ope no Mi is a Devil Fruit the Celestial Dragons specifically want. If you're honest, Sengoku and I might be able to help you.

After all, you were once a Celestial Dragon yourself. You know better than anyone how filthy they can be."

Hearing this, Rosinante fell silent for a few moments before sitting up with great difficulty. Despite the pain wracking his body, he forced a weak, awkward grin.

"Heh… Karl, you're getting way too comfortable using that Celestial Dragon identity of yours. That's not a good sign, you know."

"Save the jokes. That title is just a shield. I've no intention of relying on it.

In this world, true strength is what matters. If you want to protect Law, grow stronger instead of depending on others!"

Rolling his eyes, Karl scooped up the sleeping Law with one arm and helped Rosinante up with the other, guiding them both onto the warship.

Ding!

"You have successfully signed in Trafalgar D. Water Law. Reward: Medical Expertise (Proficient)."

"You have successfully signed in Donquixote Rosinante. Reward: Calm-Calm Fruit (No Side Effects)."

Hearing the system's announcements, Karl's eyes widened in astonishment.

He never expected to acquire a second Devil Fruit ability!

While the medical expertise was unlikely to see much use, the Calm-Calm Fruit was a game-changer. Paired with his Float-Float Fruit, it elevated him to the highest tier of assassins.

With its power, Karl could silence an entire island or even two islands clashing together—without a sound escaping.

It was every assassin's dream.

Though testing the full potential of the Calm-Calm Fruit would take time, the mere idea of developing such capabilities made Karl chuckle to himself—a grin reminiscent of Garp's carefree laughter.

"Karl, I've decided. I want to explain everything directly to Sengoku.

And yes, I forced Law to eat the Ope Ope no Mi. Please, don't hold it against him."

Unaware of Karl's distraction, Rosinante continued wrestling with his decision.

After much deliberation, he chose honesty. With Karl and Sengoku being the two people he trusted most, he felt safe revealing everything—including Law's full name and background.

Karl nodded, then called over the medics to continue tending to Rosinante's injuries.

"Rest and recover. As long as Sengoku remains Admiral and I'm still a Marine, neither you nor Law will come to harm—I promise.

However, there's one condition: Law must join the Navy, specifically the unit I designate. The same goes for you. There's no room for negotiation on this."

Rosinante hesitated briefly but ultimately agreed, knowing Karl would never harm him.

As they spoke, the sky above suddenly filled with an intricate web of threads expanding outward.

Rosinante's face paled in shock.

"Birdcage! It's Doflamingo's Birdcage! This is one of his signature techniques.

Once you're inside, you're trapped like prey with no escape! The Birdcage is impenetrable. Only by defeating Doflamingo can it be undone.

Karl, are you sure you can handle this?"

Rosinante's voice was laden with worry, but Karl didn't respond.

Instead, he gazed at the Birdcage, his expression inscrutable. After a moment of contemplation, Karl floated the warship toward the Birdcage's center and unsheathed Sandai Kitetsu.

With a light tap of the blade, the threads emitted a metallic clang.

Intrigued, Karl muttered to himself, marveling at how Doflamingo had pushed the String-String Fruit to such a level of hardness.

The ingenuity and talent were truly awe-inspiring.

After a brief pause, Karl turned back to Rosinante.

"How sturdy do you think this Birdcage is? Do you think it can withstand my full strength?"

"Uh… I don't know…"

Rosinante stammered, unsure of how to answer.

Karl smirked and enveloped Sandai Kitetsu with Armament Haki.

"In that case, let's find out—"

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