One Piece: Marine Luffy, Garp regrets it

After being swept away by Kaido's kanabo once again, Yamato abandoned the idea of a pure physical contest. With a determined gleam in her eyes, she decisively transformed into the human-beast form of her Devil Fruit, Dog-Dog Fruit, Model: Okuchi-no-Makami.

"You stubborn old dragon!" Yamato shouted, her voice carrying across the battlefield. "Let me show you the results of my training these past months!"

Her white fur gleamed under the sun as azure flames of divine power flickered around her form. "In these six months since we last fought, I haven't been standing idle!"

Kaido casually rested his massive kanabo on his shoulders. When he heard Yamato addressing him, his face darkened considerably, veins bulging on his forehead.

"Idiot child," he growled, "who are you calling stubborn? Don't forget that you inherited that very same stubbornness from me..."

Before Kaido could finish his scolding, Yamato's figure had already vanished from sight, only to reappear rushing toward him with frightening speed.

Seeing this, Kaido narrowed his eyes in recognition. "Soru? One of the Rokushiki? You even learned this from those Marine dogs." A small, almost imperceptible smile tugged at the corner of his lips. "But if you think mastering just the Rokushiki will be enough, you're severely underestimating me!"

Kaido immediately swung his kanabo downward, preparing to unleash his signature move—Thunder Bagua.

But just before his weapon descended, Yamato suddenly leapt high into the air. In mid-flight, she leveled her body and raised her own kanabo, aiming its tip directly at Kaido's chest where his heart lay beneath layers of nearly impenetrable muscle.

"Kanabo-Gun: Baku Zen!" Yamato roared.

Combining the lightning speed of Soru with the aerial maneuverability of Geppo, enhanced by the supernatural swiftness granted by her Devil Fruit, Yamato successfully targeted Kaido's heart before he could fully react.

In that critical instant, her kanabo struck Kaido's chest with such terrifying force that it caused a slight indentation in his seemingly invulnerable skin. The tremendous impact sent shockwaves across the battlefield, kicking up clouds of dust around them.

Yet most of the force seemed to dissipate against his tough dragon scales and iron-like muscles. To an onlooker, the attack might have appeared ineffective.

But only Kaido himself knew the truth. Yamato had adapted the Rokushiki technique of Shigan, the Finger Pistol, to her kanabo. Using precise control, she'd focused all the impact into a single point, then immediately infused advanced Armament Haki into the tip of her weapon, directing it inside his body upon contact.

The foreign Haki now circulated within him, specifically targeting his heart. Blood vessels and tendons in that vital area contorted as the concentrated Haki tunneled through his massive form, eventually bursting out from his back in a focused beam of power.

Even after exiting Kaido's body, the force of her attack carved a tunnel in the ground behind him—a fist-sized hole extending more than ten meters into the earth.

The penetrating power of Yamato's technique was undeniable. As expected, Kaido spat blood after receiving this precise blow—something that hadn't happened in years of their battles.

Yamato couldn't help but let a triumphant smile appear on her face. "How's that, old man?"

But her victory was short-lived.

In that moment, a powerful gust of wind erupted as Kaido used his draconic abilities to blow away the smoke and dust. With a single powerful movement, he pulled himself from the crater Yamato's attack had created.

BANG!

His dragon claw shot out with blinding speed, grabbing Yamato firmly by the head.

Luffy and the others watching the fight all furrowed their brows in concern. Viola and Mansherry even gasped in horror, covering their mouths with their hands.

Yet despite their clear worry, none of Luffy's companions stepped forward to intervene. This was Yamato's battle—one she needed to fight herself.

"Yamato, my foolish daughter," Kaido rumbled, blood still trickling from the corner of his mouth. "It seems you have indeed made considerable progress during this time."

His grip tightened slightly as his eyes reflected a complex mixture of pride and disappointment. "This is the first time you've genuinely wounded me in all these years."

He lifted her higher, meeting her defiant gaze. "But it's still not enough. If you truly wish to defeat me, you remain far too weak!"

As he spoke, purple-red lightning began to crackle around Kaido's massive hand, dancing across his skin with destructive potential.

He hoisted Yamato high above his head with a single arm, and then brought her down with catastrophic force.

"Raimei Hakke!" Kaido roared. "THUNDER BAGUA!"

BOOOOOM!!!

The moment Yamato's body slammed into the ground, the entire island began to shake violently as if struck by a cataclysmic force. The epicenter of their battle erupted, raising a mushroom cloud of debris that towered into the sky.

Viola and Mansherry watched in terror, their faces pale with fear.

"Yamato!" Mansherry cried out. "Is she...is she dead?"

"Don't worry," Gion replied in a surprisingly relaxed tone. "She won't die from something like that. At most, she'll suffer a few broken bones." There was even a hint of dark humor in her voice.

Beside her, Boa Hancock maintained a serious expression. Though her strength was comparable to Yamato's, she didn't possess the same physical resilience or the supernatural durability granted by a Mythical Zoan fruit.

Hancock knew that if she were caught by Kaido and struck with such overwhelming force, she might indeed suffer severe injuries as Gion had casually suggested.

Gion's nonchalant words frightened Koala, Viola, and Mansherry, their complexions growing increasingly pale. Viola and Mansherry were just spectators, but Koala's situation was different.

When she considered that she might have to face Kaido in battle herself later, her legs began to tremble involuntarily. She was only seventeen—practically still a child compared to these monsters of the New World. If Kaido attacked someone of her caliber with such devastating power, death seemed the only possible outcome.

Luffy noticed the panic and fear growing in the hearts of the three women, especially Koala. He turned to offer reassurance, his voice calm and confident:

"Don't worry," he said with absolute certainty. "Yamato is fine. Don't underestimate her."

The unwavering trust in his words caused them to swallow their fears and turn their attention back to the center of the destruction, where the mushroom cloud still billowed upward.

As if in response to Luffy's faith, a blast of frigid air suddenly erupted from within the cloud.

"Namuji Hyoga!" Yamato's voice rang out clear and strong.

After releasing her counter-technique almost face-to-face with Kaido's devastating attack, Yamato leapt out of the crater. With several nimble backward jumps, she created distance between herself and the Yonko.

Koala and the others looked quickly toward her, relief washing over their faces. They could see shards of broken ice falling from Yamato's body as she moved.

This was her defensive technique "—a skill that created a layer of ice armor around her body as protection. She had relied on this frozen shield, reinforced with Armament Haki and the Tekkai iron body technique, to withstand Kaido's earth-shattering blow.

But even with these formidable defenses, Yamato couldn't completely negate the massive impact. Her internal organs protested painfully, and she fought to maintain her composure as she faced her father once more, determination burning in her eyes.

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