As they were returning home.
Garp: Larch tell me do you feel a connection with Kuina sword.
Larch: I feel it but it's a weak connection.
Garp: "Could it be the type of sword?" What type of sword do you prefer?
Larch: I prefer the Katana. Even though it's a thin sword and can be easily be broken, it as easy maneuverability, it's weightless and the cut power is astonishing, but the main reason is because i just love them.
As he said that he smiled like a kid in his age should surprising both his brothers and Garp.
Garp: "What a smile. In the end he is a kid. Kuina weapon is one of the best in the world, being a O Wazamono, but his connection was a weak one and the weapon is of his type of being a katana, so what could make the connection between him and the swords, the possibilities are it being completely coincidence, he refusing to connect with the sword to give it to Kuina or that worn sword is of a higher quality of Kuina weapon, but that would make it a Saijo O Wazamono."
Garp: "No, no, no that is impossible."
As they arrived at the camp where the house of Dadan stood, Garp turned towards Larch.
Garp: Larch i want you to experiment something for me.
Larch: You want me to clash my sword with Kuina. Right? After all i didn't clash it in the duel with Koushirou.
Garp: Yes.
Larch: What do you say Kuina?
Kuina: Ok captain.
Larch: Oh i like that, but you can call me just Larch, after all you are my first member and first mate in my crew.
Inside the house as Dadan heard the voices came to the window and saw Larch talking with other beside his brothers, even though he was a terrible kid and not of her blood, this sight brought tears to her eyes.
Ace: Hey brother what about me and Sabo.
Sabo at the same time nodded his head.
Larch: What do you mean?
Ace: Aren't we part of your crew?
Larch: No.
Hearing him both Ace and Sabo became depressed.
Larch: Even if you aren't in my crew you will always be my brothers and that means that i will support both of you whenever you need, but you can join my crew if you aren't confident enough to raise one of your own and then compete with mine.
Ace and Sabo depression was gone and fires of determination appeared in their eyes.
Kuina: So are we gonna do this or not?
Larch: Yes sorry.
Both unsheathed their swords and clashed using their swords, the sound of metal against metal resound but Larch rusty sword didn't break.
Garp: Larch do you mind if i take your sword to clean and repair it.
Larch: Yes i mind, i won't ever separate from my sword, about repairing it there is no need for now and in the future i will repair it myself.
Garp: You stubborn kid, this could be one of the strongest sword in the world, a Saijo O Wazamono, and you want to let it stay in this state.
Larch: I don't want it to stay in this state, but no one else will touch it, unless i allow it.
Garp: Then allow it!
Larch: No, because i don't know the blacksmith that you are taking it to.
Kuina: So this is aSaijo O Wazamono. Captain Larch can i touch it.
Larch: Yes, if you call me by my name like i told you before.
Hearing her request, he respond immediately and gave her the rusty sword.
Garp: Wait so you let someone you meet today to touch it, but don't let me take it to a blacksmith to repair it.
Larch: No, because she is of my crew.
Garp no longer tried, he gave up, it was impossible to discuss with this kid, he didn't changed his mind over nothing. Sighing he asked.
Garp: So as you have a connection with it do you know anything about it?
Larch: It's known as Higure and as you have guess it is a Saijo O Wazamono.
7 years later.
During this years, Luffy also had the opportunity to become part of the brotherhood between Sabo, Ace and Larch as per the agreement and after a while Ace and Sabo accepted him as such. One day the Bluejam pirates came to capture the five, Sabo, Ace, Larch, Luffy and Kuina, but they didn't came out alive from the forest that day, to prevent troubles to arise in the future Larch sneaked out at night when everyone else was a sleep, except for the fact that the only one that was asleep was Luffy. Sabo, Ace and Kuina were already waiting for him. That night was bathed in blood, except for Sabo parents, which Sabo asked to spared as, in the end, they were his parents. During the years everyone trained their weapons mastery and Haki. Larch reached Sword Master level, he could use the Armament Haki to cover his body and Higure, although it was still a a low level, his Observation Haki didn't progress much as it was hard to train, but he still achieve great results in which he could see the people aura, he also trained to become a blacksmith. Ace reached Spearsman level, both his Haki didn't progress much as he trained more in the spear mastery in these years from his brother recommendation. Sabo was the same as Ace, but he reached Staffsman level and his Observation Haki was higher than Ace, but his Armament was weaker. Luffy mostly trained in the use of his Devil Fruit. And finally Kuina, she did the same training of Larch, she reached Swordsman, as she had the foundation and training from her father training and the dojo, she also had great progress in the Haki.
This day was the day that Ace, Sabo, Larch with Kuina will set sail today.