On an emotional level, Yang could become more empathetic. The bond created through Naruto giving her his arm makes her understand his selfless nature better. She may start to act more like Naruto in terms of helping others and being more in tune with the needs of those around her. This change in her character could also lead to her making new friends and alliances based on her newfound understanding and changed personality.
She might become more cautious. Having received Naruto's arm, she realizes the great sacrifice he made. This could make her think twice before engaging in battles recklessly, as she now has a part of someone she respects and doesn't want to waste this 'gift'.
It can make him more empathetic. Since he has experienced loss (his original arm) and now has to adapt with a prosthetic, he might understand others' pain better. For instance, when he meets a disabled ninja, he can relate to their struggles.
Naruto might become more introspective. He has always been action - oriented, but losing his arm could force him to think more about his actions and their consequences. For example, he may be more cautious when engaging in battles.
He would likely become more cynical. Naruto is usually so full of hope and belief in the good of people, but giving up on his family would make him question his own values. He might start to view relationships as more fragile and be less trusting in general.
It would change his abilities in multiple ways. Firstly, with the Rinnegan, Naruto could have better perception of the world around him, similar to how Nagato was able to sense things from afar. Secondly, he might be able to use the Animal Path to summon powerful creatures. This would give him more options in battle. Also, the Rinnegan could potentially allow Naruto to access some form of chakra absorption or manipulation that he didn't have before, further diversifying his power set.
Well, if Sasuke gives Naruto his Rinnegan in fanfiction, Naruto's abilities would be greatly enhanced. The Rinnegan is extremely powerful, granting abilities like the Six Paths techniques. Naruto might gain better control over space - time, be able to use powerful gravitational and repulsive forces more effectively, and perhaps even access new forms of chakra manipulation. This could make him an even more formidable opponent, able to take on stronger enemies with ease.
He becomes more solitary. Without the pursuit of love, Naruto focuses more on self - improvement and his ninja skills. He might seem more aloof as he distances himself from the idea of a relationship. For instance, he spends more time training alone in the forest.
Maybe he starts to train with one - armed techniques. He could learn from other one - armed ninjas if there are any in the fanfiction world. His friends would also play a big role. They might encourage him to keep going or help him in his training.
It could add a lot of drama. The sacrifice of a limb is a huge deal, and it would change Naruto's abilities and his role in the story. It might make him more of an underdog, which could lead to new character development as he has to adapt to his new physical state.
Well, if Shisui gives Naruto his Sharingan in the fanfiction, Naruto's perception abilities would likely skyrocket. The Sharingan can see the flow of chakra, so Naruto could detect enemies more easily. He might also be able to copy some jutsus more effectively, just like Sasuke and Kakashi can with their Sharingan. However, Naruto would have to learn to control this new power as it might conflict with his own natural chakra control methods.
This would be a huge change for Naruto. Firstly, the Sharingan's ability to see chakra flow would let Naruto analyze his opponents' weaknesses more accurately. He could potentially use this to improve his Rasengan or develop new jutsus. Moreover, in terms of combat, he could enter genjutsu battles on a more equal footing, which was something he previously struggled with due to his lack of natural genjutsu skills.