It's possible that Naruto's overall physique could be altered. Dragons are known for their strength and agility. So, Naruto might become more muscular and his movements more fluid and graceful. His body could also develop a natural resistance to extreme temperatures, whether it's the searing heat of dragon's fire or the cold of their lairs. This would allow him to endure harsh environments that would normally be difficult for a normal ninja.
If Naruto was trained by the Akatsuki in fanfiction, his relationships would be completely transformed. For starters, his relationship with Kakashi would be strained. Kakashi has always been Naruto's mentor in a way, and seeing Naruto side with the Akatsuki would be a shock. His friends like Sakura and Shikamaru would also be confused and probably try to bring him back to the 'right side'. And his relationship with the villagers of Konoha would turn sour as they would fear his new - found Akatsuki - related powers.
Naruto would probably become more serious. Shisui was a serious - minded ninja. His training might make Naruto less impulsive and more calculated in his actions.
Naruto's character would likely become more cynical. Orochimaru's ways are full of deceit and self - gain, and Naruto, being around that, would start to question the ideals he once held. His usually bright and optimistic personality might be clouded with a sense of distrust and a more cut - throat attitude.
Naruto's abilities would change significantly. Ichigo has unique spiritual powers, and through his training, Naruto might develop a form of 'spiritual chakra'. His ninjutsu could become more powerful as he combines the new understanding of energy with his existing chakra control. Also, Naruto's combat strategy would shift as he learns from Ichigo's more direct and aggressive fighting style.
Naruto's power would change in multiple ways if trained by Scorpion in fanfiction. Firstly, his ability to deceive his opponents would increase. Puppets can be used to create illusions and false attacks, and Naruto could master this aspect. Secondly, his power in team battles could be enhanced. He could use puppets to support his teammates from a distance or create barriers. His overall combat style would become more versatile. He wouldn't just rely on his brute strength and chakra - intensive jutsu. Instead, he would have the finesse of Scorpion's puppet - based combat, which could make him a more unpredictable and dangerous opponent in the ninja world.
Naruto might become more sly. Since Loki is a trickster, Naruto could pick up some of his devious ways. He may not be as straightforward as he used to be.
If trained by Sanji, Naruto's sensory abilities could get better. Sanji has a good sense of smell which he uses in various situations. Naruto could learn to use his senses more effectively, not just relying on his chakra senses. Also, Naruto's ability to endure pain might increase. Sanji has endured a lot in his life, and he could pass on some of that mental toughness to Naruto, allowing him to push through tougher battles and train harder without getting worn out as easily.
If Naruto is trained by Akatsuki in fanfiction, his skills would be transformed in multiple ways. His chakra control could be refined to a much higher level. Akatsuki members are experienced in dealing with large amounts of chakra, and they could teach Naruto how to better manage his own vast reserves. His combat strategy would shift from the more straightforward and honorable style of Konoha to a more cunning and adaptable approach. He might also gain knowledge about sealing techniques that the Akatsuki has used to capture tailed beasts. This new knowledge could not only enhance his fighting abilities but also give him an edge in dealing with other threats in the ninja world. His ability to sense and counter opponents would be sharpened as well, as the Akatsuki often deals with dangerous and powerful foes.
If trained by Kurenai, Naruto could develop a more fluid and evasive fighting style. Kurenai is good at moving around undetected and quickly changing positions. Naruto could pick up on this and combine it with his own speed and agility. His movements in battle could become less predictable, making it harder for his opponents to land a hit on him. Also, he might start using genjutsu - enhanced taijutsu, where he uses illusions to misdirect his opponent's defense while delivering a physical blow.
His personality might become more brooding. With Darth Vader's influence, Naruto could lose some of his naivete and become more cautious.