At this moment, Kuina used her fastest speed as she fiercely thrust her sword that was enveloped with Rain Flame toward his father.
"Shigure Soen Ryu, 1st form: Axle of Rain!"
Seeing this fierce attack, Koshiro's eyes became serious, but he was faintly smiling at the same time.
Obviously, he was also pleased with his daughter's growth. Although he once believed that women could not become the world's greatest swordsman, he also hoped that his daughter could fulfill her dream!
"Shigure Soen Ryu, is it? It is indeed an excellent sword style. Was it created by Ugetsu Asari-sama?"
He thought deep down as he swung his katana. Following the sound of metal colliding, the pitch-black sword accurately blocked Kuina's Wado Ichimonji.
However, Kuina did not stop her assault just because her Axle of Rain was blocked. She immediately performed a downward slash as if she knew from the beginning that her father would block Axle of Rain, so she had thought of how to deal with it in advance.
"This one is more obvious than the thrust earlier. Do you think I..."
Koshiro swung his sword to block Kuina's attack, but it was at this moment that his eyes widened!
"That woman! Where is her sword?" At this moment, Zoro was speechless. He felt that his swordsmanship was way behind from this father and daughter.
"Shigure Soen Ryu, 5th form: Early Summer Rain!"
At this time, Giotto slowly said the name of this move: "A feint where you pass your sword to your other hand as you attack. If used at a perfect timing, the opponent will be unable to guard against it!"
"Passing the sword to the other hand and timing... is she that powerful?" Zoro swallowed his saliva, but his eyes were not discouraged at all. On the contrary, he seemed even more in fire, "Kuina, is it? Even if I am no match against you now, I will definitely work hard and defeat you one day!"
He didn't get discouraged when he faced a tall wall in front of him. That was why this little mossball could come as far as he did in the manga!
"Ding!"
Suddenly, the sound of metal clashing resounded again.
As Giotto looked over, Giotto saw that Koshiro had already changed his katana's trajectory in the nick of time and blocked Kuina's Wado Ichimonji with the tip of his katana despite nearly falling for Kuina's feint.
"You have really grown, Kuina! Then, I will use a stronger move, be careful!"
After pulling some distance from Kuina, Koshiro held his hilt with both hands, took a deep breath, and his aura became a lot more stable, "Shimotsuki Isshinryu…"
In an instant, Koshiro raised his sword with both hands, and it was as if a silver moon had risen behind him. The temperature around him also dropped and his aura had changed.
At this moment, Kuina was shocked. This was the first time she had seen her father got this serious. However, this also made her smile.
This meant that her father had already acknowledged her!
Since that was the case, it was her obgligation to respond it with all her might!
"Shigure Soen Ryu..."
She gripped the hilt of her sword and ran forward. "8th form: Pouring Rain!"
"Silver Moon!"
The two swordsmen's final technique was like a flower blooming in an instant. The moment Kuina's Pouring Rain and Koshiro's Silver Moon clashed, Giotto seemed to see the stormy night and a bright silver moon.
However, both of their movements were very sharp. The moment their technique clashed with each other, both of them knew that there was no way to determine the winner, so they both backed off afterward. However, the more experienced Koshiro immediately leaped up, and as his body rotated in the air, it was like he transformed into a full moon...
"Shimotsuki Isshinryu: Night of the Full Moon!"
"Shigure Soen Ryu, the 9th form: Duplicate Rain!"
At this moment, Kuina also reacted. She slashed upward, creating a wave of water before rushing toward Koshiro.
"Stop, sensei!" Zoro suddenly shouted.
At this time, Koshiro could no longer change the direction of his sword. He swung the sword in his hand and split Kuina's body into two...
Kuina, whom Koshiro cut into two, turned out to be her reflection created by Rain Flame!
The shadow that was reflected on Rain Flame!
It was at this time that Kuina came from the side, thrusting her sword toward her father's neck. She would've won at this point if she were facing any other opponent but she was up against her father, Shimotsuki Koshiro!
She could not kill her father, and Koshiro could not be defeated by Kuina, who was still a kid!
"Shimotsuki Isshinryu..."
At this time, Koshiro murmured, "Hidden Moon!"
Koshiro suddenly disappeared out of thin air. In the blink of an eye, he reappeared on the right side of Kuina with his katana placed on Kuina's neck.
The victor had been decided!
Kuina panted for a while before Sheathing Wado Ichimonji back into his scabbard. Then, she turned around and looked at his father. "Thank you for your guidance, Father!"
She was not even ten years old, yet she was already able to fight against someone of Koshiro's level to such an extent. Even if Kuina was defeated, she certainly had proven her strength!
Of course, Koshiro didn't use his full strength, but many pirates with a bounty of more than 100 million would've fallen to the technique he used just now!
"Kuina…"
Koshiro slowly put away his blade, and his face once again revealed his usual gentle smile, and a sentence that made Kuina cry came out of his mouth: "You will definitely become the world's greatest swordsman!"