In a fanfiction, Naruto, Yamato, and the katana could be part of a quest. For example, they are on a mission to return the katana to its rightful place. Along the way, they face many enemies and Naruto uses his unique skills while Yamato uses his wood - style jutsu to protect the katana and each other.
A simple way is to have Yamato train Naruto in katana - wielding techniques. Since Yamato is a skilled ninja, he could teach Naruto how to handle a katana, which Naruto might initially resist as he's more used to his own combat style. But as he learns, he discovers new ways to combine his ninjutsu with katana - based attacks.
Yamato might show his concern by constantly checking on Naruto's condition. He could be seen sitting by Naruto's bedside, feeling his forehead for fever regularly.
The katana's connection to ancient ninja clans is also a popular theme. Fanfictions might explore how a particular katana was passed down through generations in a clan, and how it holds secrets or powers related to the clan's history. This can lead to interesting storylines about clan rivalries and alliances centered around the katana.
A katana with a lightweight blade would be good for Naruto. Since he is used to quick movements and acrobatics, a heavy katana would slow him down. Maybe one with a blue - tinted blade to match his ninja - wear colors. It could also have some chakra - conductive properties to enhance his attacks.
Yamato might first be a bit shocked. But then he'd probably try to calm Naruto down. He could use his wood - style jutsu to create a peaceful environment, like making a small forest around them to soothe Naruto.
Yamato might first try to use his calm and steady presence to soothe Naruto. He could place a hand on Naruto's shoulder and speak in a gentle voice, telling him to take deep breaths.
Naruto might be in awe of the battleship Yamato at first. He could use his chakra to enhance the ship's speed or power in some way. For example, he could transfer some of his chakra to the engines to make it move faster.
One possible plot could be that Yamato, with his calm and disciplined nature, instills in Naruto a better sense of self - control. Naruto might learn wood - style techniques earlier. He could also grow up with a stronger connection to nature due to Yamato's influence. For example, Naruto might be more in tune with the forest around Konoha and use it to his advantage during missions.
Growth and acceptance are also common themes. Often, the stories show Naruto and Yamato growing as individuals as they come to terms with their feelings for each other. For example, they might learn to accept parts of themselves that they were previously ashamed of because of their relationship.