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.
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.
Naruto's character would likely become more reserved in some ways. Yamato is not as boisterous as some of Naruto's other influences, so Naruto might think before he acts more often. His fighting style could also be more strategic, incorporating Yamato's wood - style and knowledge of chakra control.
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's wood - style jutsu could be seen as a form of nature - based magic in the Devil May Cry world. He could use it to create barriers against demons or even trap them, much like how Dante uses his devil arms to fight. His ability to sense chakra might also translate to sensing demonic energy, allowing him to detect hidden demons.
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.
He may become more patient. Yamato is a calm and collected ninja. His training methods might instill a sense of patience in Naruto, which is something Naruto lacks in his impulsive nature.
Yes, there probably are some well - written ones. But it really depends on your definition of 'well - written'. Some might have great characterizations, while others could have interesting plot twists. It's all about finding the ones that suit your taste. You can start by looking at the top - rated ones on fanfiction platforms.