Uchiha Puppet Master, Starting from One Piece

"Rangiku and Robin, today I'll talk about my chakra training system. It's different from the training system Robin is familiar with, and I'd like to encourage you two to try training chakra with my help."

As he spoke, Uchiha Shiraha moved a chair over and gestured for the two of them to sit down and talk.

"This is not because I favor the cultivation power of my homeland, but because it can truly enable you two to break through bottlenecks and become stronger at the fastest speed. Moreover, this power is unique in this ocean, and it is impossible to obtain this power without my help."

"Chakra? What kind of power is this? I've never seen anything like it described in any books."

Nico Robin couldn't help but marvel at the vastness of the world; it was astonishing that such a learned scholar as herself was so unfamiliar with this term.

Seemingly noticing Nico Robin's confusion, Uchiha Shiraha gave a brief explanation of the differences in the power systems.

"Miss Robin, perhaps no one has told you that to have true strength on this sea, you need to rely on Devil Fruits, Haki, and physical skills. Robin, you only have the power of a Devil Fruit, so you don't have the ability to fully protect yourself."

Upon hearing Uchiha Hakuba's words, Nico Robin fell silent. However, as a scholar, her greatest love was reading more books rather than becoming stronger. Yet, the threat to her survival forced her to become stronger.

Seeing Nico Robin reflecting on herself, Uchiha Hakuha continued to analyze: "For example, your Flower Flower Fruit can be used for both attack and control, and Haki can strengthen your body and sense enemies. Even on this vast ocean, you can stand on your own by honing your swordsmanship and developing your Devil Fruit. However, the training of Haki and the tempering of your own body are not things that can be accomplished overnight."

Uchiha Hakuba explained the chakra system to the two of them in detail.

The core of the chakra system is chakra, a fundamental power that combines physical and spiritual energy. Its foundation lies in the three types of jutsu: ninjutsu, taijutsu, and genjutsu. Being able to use chakra in the world of One Piece is an amazing thing.

Because chakra is so versatile—it can be used for attack, healing, and even for training the body—it makes the already powerful natives of the pirate world even stronger.

After listening to Uchiha Hakuba's explanation, Matsumoto Rangiku couldn't refuse what Hakuba was saying, and Nico Robin also didn't refuse a method that could make her stronger.

On the boundless sea, the aroma of sake brought by Matsumoto Rangiku wafted on the sea breeze, mingling with the scent of hot tea brewed by Robin, creating an exceptionally pleasant atmosphere.

Uchiha Shiraha sat on the cushion, surrounded by a faint, stable wisp of chakra, like a soft halo of blue light mixed with red light. This was the external release of chakra, a high-level technique even in the ninja world.

Matsumoto Rangiku sat cross-legged to his left, a sake bottle beside her, her eyes closed as she focused her chakra. She felt the energy within her body flickering, dissipating like smoke in the wind as soon as it gathered. She couldn't help but frown, raising her hand to rub her throbbing temples, her tone tinged with frustration: "Damn it, this is difficult too. Although I've never been to Seireitei to take the exam to become an apprentice Shinigami, I feel it's even harder than becoming a Shinigami."

Nico Robin sat on the right, her fingertips lightly resting on the edge of the table, her expression quiet and focused.

She tried to imitate Bai Yu's appearance. He could feel an energy forming within his body, although this power was as thin as a thread and would break if he exerted too much force.

She wasn't impatient; she simply looked up at Bai Yu, her eyes filled with gentle doubt: "Bai Yu-kun, the energy of chakra and Devil Fruit abilities seem to be completely different."

"Chakra originates from the resonance between body and mind."

When it comes to beautiful women, Uchiha Hakuba is clearly more patient. Unlike when he taught Uchiha Sasuke, Hakuba is much gentler.

"Rangiku, you don't need to rush. Just like yesterday when you swung your sword for the first time, feel that sense of control and ease with your chakra. Robin, your Devil Fruit ability depends on your physical strength, and so does your chakra. You need to learn to meditate..."

Following his guidance, Matsumoto Rangiku closed her eyes, no longer rushing to gather chakra, but slowly recalling the smooth, flowing feeling when she swung the sword, letting Shiraha's chakra guide her, gradually transforming the power of her mind and body into fragments of chakra.

Suddenly, guided by Uchiha Shiraha, a cutting gust of wind emanated from her fingertips. She abruptly opened her eyes, filled with elation. She patted Shiraha's shoulder, then leaned close to Robin, her voice beaming, "Robin, Robin, look! I did it!"

"It's wind-style chakra!"

Uchiha Hakuba also noticed the gust of wind and made his own judgment.

Seeing this, Robin's eyes flashed with a smile, and she nodded slightly.

With the help of Uchiha Hakuba, a violent bolt of lightning appeared.

Although she remained calm, the smile at the corner of her mouth betrayed Nico Robin.

Seeing the two of them so excited, Bai Yu couldn't help but sigh that everything was finally on the right track.

Rangiku, with her cheerful disposition, couldn't resist pouring three cups of sake after practicing for a while. She handed one to Shiraha and another to Robin, saying with a smile, "It's rare to feel so relaxed. If you're tired from practicing, have a drink and rest!"

She raised her glass, a smile in her eyes: "Back in Rukongai, I didn't know anyone except Gin. Now that you two are here, it feels even more lively."

Robin took the glass and took a small sip, a rare occurrence for him, with a faint smile on his face: "I used to study ancient books alone most of the time, or I was on the run. I rarely had time like this to practice with you all. It's very reassuring."

Bai Yu looked at the two people in front of him. One was cheerful and outgoing, with gentleness hidden in his eyes; the other was calm and gentle, with a clear mind.

He gently touched their glasses together and said in a low voice, "Let's not stand on ceremony. From now on, we'll practice together, spend time together, and grow together."

That night, Nico Robin seemed to let down her guard and would explain the ancient scripts she had seen to the two of them, as well as the local customs and traditions of various places, which captivated them.

Bai Yu would patiently correct their chakra usage and occasionally tell them little stories about the ninja world, setting aside the scheming and intrigue, focusing only on the ordinary and mundane.

A gentle evening breeze blew by, and Rangiku leaned on Robin's shoulder, her hand resting restlessly on Robin's waist, saying with a smile, "We'll practice like this every day from now on, Robin, you have to stay with us forever!"

Robin nodded gently, his eyes filled with warmth: "Okay, let's do it together."

For Nico Robin, this kind of life was enough to satisfy her. If she were to be captured, she would never let her two true friends be implicated because of her.