One common theme is power. Since the Ryu concept often brings in strong and unique powers, the fanfictions usually explore how these powers are developed and used in the Naruto setting. Another theme is identity. Characters with Ryu elements often have to figure out their place in the world, whether they are accepted or not.
Naruto himself is often a popular character in such fanfiction. Writers might explore how he would adapt to the Shirai Ryu techniques and incorporate them into his already vast array of skills.
Perhaps the fanfiction could revolve around Naruto time - traveling to the world where Ryu Hayabusa exists. There, he witnesses Ryu's battles and is in awe of his strength and honor. Naruto then decides to train under Ryu to become stronger. During this training, Naruto has to adapt to a different style of combat without his usual ninja tools. He learns to rely more on his body and speed, like Ryu. This experience changes Naruto's perspective on fighting and when he returns to his own world, he brings back a new sense of confidence and fighting ability.
In this kind of fanfiction, Naruto might learn new fighting techniques from Ryu Hayabusa. Ryu is known for his ninja skills in his own universe, so he could train Naruto in a different way compared to what Naruto is used to in the original Naruto world.
Sure. One great Naruto Ryu fanfiction is 'The Ryu's Path in Naruto'. It follows a unique take on a character with Ryu abilities in the Naruto world, exploring their journey to become a powerful ninja. Another one could be 'Naruto and the Ryu Bond' which delves into the relationship between Naruto and a Ryu - like creature, full of interesting adventures.
One interesting Naruto Shirai Ryu fanfiction could be about a young ninja who discovers a hidden Shirai Ryu technique that was lost for centuries. This discovery sets him on a journey to master it and use it to protect his village from a new and powerful threat.
Naruto might become more serious about combat. Ryu Hayabusa is known for his intense focus in battle, and Naruto could adopt this trait. Instead of his sometimes impulsive fighting style, he would be more calculated, thinking several steps ahead like Ryu.
Well, in a fanfiction world, it could happen if there was some sort of cross - dimensional or time - traveling event. Maybe Naruto stumbles upon a portal that leads him to the world where the Hiten Mitsurugi - Ryu exists. There, he meets a master of the style who sees potential in Naruto and decides to teach him.
Another possibility is that some of the more power - hungry ninja from Naruto's own world might become antagonists. They could be jealous of Naruto's new connection with Ryu Hayabusa and the potential power and knowledge he could gain from it. These ninja might try to undermine Naruto or even try to harm Ryu to prevent Naruto from getting stronger. Maybe some of the rogue ninja or the hidden enemies within the ninja villages would see this as an opportunity to make a move against Naruto.
His speed would likely increase significantly. The Hiten Mitsurugi - Ryu is known for its fast and fluid sword movements, so Naruto would need to adapt to this new speed. He might start using more acrobatic maneuvers during combat, like leaping and spinning in ways he didn't before.