"How did you do that"
"Yeah he didn't even pull out his sword"
"WOW Kenshin is so cool"
Like this Usopp, Chopper, Franky any Nami began cheering. Kenshin looked at them and said, "It is low-class Legendary level sword mastery. In legendary realm they can create their own domain where they can cut anything they want"
"So, Mihawk has reached this stage", asked Zoro.
"Yes we two are the only one in this world to achieve this. But did that make us strongest? No, there are still many who are stronger than us. So you see there is a very long route for you guys to become strong", said Kenshin.
"But why do we have to become strong to defeat them. We can just search for one piece", said Usopp while Nami and Chopper nodded.
"Are you three idiots. Gold Roger's crew was very strong but didn't you guys see regret in Rayleigh's eye when he say they were too hasty to learn everything, it was because their strength was not enough to fend off the dangers.
And as Usopp said we can just search for one piece. I am fine with it bu then what. After searching one piece when every person in this world wants to kill you to get it. What will you do then. I am going to say it very clearly. Except for Sanji, Zoro and Luffy others are very weak", said Kenshin.
When everyone heard this, they get what Kenshin was trying to say but still got very angry when Kenshin spoke it too bluntly. When they were about to enrage Kenshin waved his hands and said, "That's why I have decided to be the trainer of the ship and will train you guys to become strong"
When everybody heard this, they understood Kenshin's intention.
"Well there are still about 10 days to Fishman island. I will train each one of you guys before that and also in the coming journey", said Kenshin.
"If we only train, then who will enjoy"
"Yeah yeah we have to enjoy"
"I want to eat fish"
Kenshin was at his limits, so when Luffy, Chopper and Usopp spoke, he directly used Haki and beat them in a way to hurt them very much but not injure them.
"Now, who wants to enjoy", said Kenshin with a smile that caused everybody a chill down their spine. They knew if they make Kenshin mad, then the ever good guy will become a demon.
"I see Blood Devil name was not for show", said Robin. Hearing Robin Usopp and Chopper started shouting "Devil" and they became unconscious because of fear.
After that the training of the straw hats began. For Nami, Kenshin explainer her about Kembunshoku Haki only as her physique is very weak and she is not a fighter and her weapon is unconventional. Kenshin can only give her some ideas about the things from his past life to help her better.
After that it was Robin's turn, to her Kenshin explained both Kembunshoku Haki and Bushosoku Haki.
She had already began to grasp Kembunshoku Haki, so he just explainer ways to achieve it a bit easier.
And for Kembunshoku Haki, Kenshin gave her a training manual to increase her strength and ways to activate Kembunshoku Haki. He also gave her many ideas in which she can work her devil fruit ability in a more efficient way.
Now it was the same for Chopper and Usopp as they both need both the types of Haki. He also gave them ways to improve their strength as well as activate Haki and master it.
For Franky, there was no need for physical exercise. Kenshin only told him about Haki and many things that he learned in the past life regarding Robotics. Well if Franky could use Haki on his metallic arm, it will be huge power boost.
For Brook, he only told about Kembunshoku and Bushoshoku Haki. Also gave him a sword technique to practice or refer and told him about sword mastery. Brook's strength was okay but he didn't have sword mastery otherwise he would have been more deadly.
Now for Sanji and Zoro of the Monster Trio, Kenshin told them ways to master Haki faster and explained ways of martial arts and sword arts to both of them as Kenshin has a lot of experience in it.
And lastly, Luffy will not able to understand if explained. He will only get better by fights, so he can only improve his strength. Kenshin told Luffy to wear sea stone cuffs(that for some reason Kenshin has) and do exercise that Zoro does normally. Like weight lifting and all but using sea stone cuffs. And also told him to activate his Haki till he gets drained.
After telling them what to do, Kenshin just fended of attacks of any incoming beast and periodically helped the crew in their training. As they were training, Kenshin told them to be focused for at least 10 days and in these days he will cook it for them, so they will not have to worry.
Kenshin used some of the beast that has attacked to made food. After the first day everybody except Zoro and Sanji were exhausted as Kenshin really trained them very harshly. The good thing was that Kenshin's cooking was not below Sanji, so they can train and eat good nutritious food.
Kenshin also didn't forget to improve himself as he still swings his sword endlessly as he practiced his own sword art and many different other sword arts. He wants to practice them to understand and comprehend about sword arts.
Like this the passed and it was 5th day, Everybody began noticing the changes. Nami, Robin, Usopp, Chopper, Brook and Franky, all of them have learned Kembunshoku Haki though it was only beginner level but it was still great.
Kenshin looked at them and thought, "I was right. They all are talented. It just they didn't train seriously or didn't have a proper instructor to teach them. Now with me, I will make them way stronger than before".
And as for Zoro who was at low Master class, his mastery went to mid master class and if he trained like this, then in a year he will reach grandmaster level without fighting and with life and death fight, it will be higher.
Sanji was also like that, Kenshin mentioned about martial art mastery similar to sword mastery which will improve his strength. And it was no doubt, Sanji with his talent with kicking martial arts became about proficient level in Kicking mastery. It improved his power a lot.
Luffy who was using sea stone cuff using Haki was now getting less and less tired and his Haki is also improving. Luffy's Haki was now at mid-Master level.
Like this, they reached near Fishman island. The fish that attacked were all killed mercilessly and eaten by the straw hat pirates. Everyone was very happy to see all the amazing underwater world. As they were enjoying, so fishmen who were riding on sea king came.
"Oye, you are human pirates, means you guys are enemies"
"I heard they beat up Arlong and his gang"
"But they beat up that Tenryubi and saved Hachi"
"Okay, you guys are like our beloved Fisher Tiger"
"Okay now. You will join us or refuse us. Remember to refuse us and you will die"
Hearing them talk, all the straw hat have different emotions. Luffy was imagining the taste of the sea kings. Zoro and Sanji were silently looking at them. Nami was angry, fearful and sad hearing Arlongs name.
Luffy of course with his attitude said a big NO and made ugly faces towards them. After that, the sea kings began attacking the ship. Kenshin who was just there wasn't going to let that happen. Kenshin spread out his domain around the Thousand Merry and started cutting down everything that entered it.
The Fishman by the name Hammond of the New Fishman Pirates was scared to death. All his friends and their pets were about to destroy Straw Hats ship but suddenly they all died. Kenshin couldn't let an enemy escape if possible, so he expended his domain in one direction towards Hammond and killed him.
The straw hats were shocked, they have seen killing but this was intense for them.
"Why did you kill them all. Fishman is good people", said Luffy.
"Not every Fishman is good like Jimbei and not every human is bad as Tenryubi. You understand that right", said Kenshin.
He was still angry but he still understood what Kenshin meant. They all have seen killing and murders in their life (except chopper), so they quickly calm down. After that, they entered the Fishman Island which was like a huge bubble and contained within were Fishman. They entered the bubble, but as they entered their coating canceled. Kenshin thought how did this happen.
But still, he pulled everyone using ki rope and used another rope to bring the ship to the shore. The area he came out was near Hachi's Takoyaki shop.