His sense of self - identity might be shaken. Ichigo has always been defined by his role as a Soul Reaper and his own unique powers in the Bleach universe. Adding the Sharingan would introduce a foreign element. He would have to figure out how this new power fits into his existing power set and his moral code. He might question whether he's still the same Ichigo or if this new power is changing him into someone he doesn't want to be. This internal struggle could lead to significant character growth as he grapples with his new identity.
Naruto's confidence would likely increase significantly. Having such a powerful and unique ability would make him feel more capable of protecting his village and friends. He might become a bit more reserved at first, as he tries to understand and master the new power, but eventually, he would use it to be more assertive in battles and in diplomatic situations as well, knowing he has an ace up his sleeve.
Naruto would likely become more introspective. The Rinne Sharingan is a very powerful and somewhat mysterious ability. Having it would force Naruto to understand more about the deeper aspects of chakra and the ninja world. He might become a bit more cautious as he realizes the great power he holds and the potential for it to be misused.
Ichigo's character would become more complex. He has always been a straightforward fighter, but with Kyoka Suigetsu, he'd have to deal with deception. He might become more cautious in his battles, always doubting what he sees. His relationships with his friends could also be strained as they might not trust him with such a deceptive power. He would have to constantly prove that he's still the same Ichigo and that he won't use the power for evil.
Sakura would become more confident. With the Sharingan, she would have an edge in battles, and this would boost her self - esteem. She would no longer be just the 'healing ninja' but a powerful combatant too. Her relationships with Naruto and Sasuke would also change. She might be less in Sasuke's shadow and could even rival him in some aspects.
His confidence might grow faster. Since the Sharingan gives an edge in combat, Naruto would likely win more battles early on, which would boost his self - esteem. He might also become more introspective as the Sharingan has some psychological aspects to it.
Naruto's character would likely become more versatile. The Gunbai would force him to think differently about combat, as it's a different weapon compared to his kunai or shuriken. This would make him more strategic and less reliant on his brute force.
Sakura's character would develop in terms of her combat skills. The Sharingan would allow her to analyze her opponents' moves more quickly and accurately. This would also boost her self - esteem as she would no longer be seen as just a support ninja. She would start to take on more dangerous missions and grow as a leader within her team. For example, she could use the Sharingan to see through genjutsu more easily during battles, which would give her an edge. Additionally, she might develop a new sense of pride in her abilities that was not there before, as she now has a unique power that few others possess.
His character would develop in terms of leadership. With the Rinne Sharingan, Naruto would have even more power at his disposal, which could make him a more formidable leader. He could use the knowledge and abilities it gives him to better protect his village and make more informed decisions. For example, he could use its precognitive abilities (if it has any in the fanfiction) to anticipate threats and plan accordingly. Also, he might become more isolated as he tries to master this new power, but in the end, it would make his bonds with his true friends even stronger.
Naruto would likely become more introspective. The Mangekyo Sharingan often comes with a lot of emotional baggage in the Naruto universe. So, Naruto might start to question his own identity more, especially since this power is from a clan he has no blood relation to. He could also become more cautious as he learns about the potential dangers of misusing the Mangekyo Sharingan.
Well, Naruto having the Mangekyou Sharingan and Rinnegan in fanfiction would change him a great deal. His character development would involve a lot of self - discovery. He'd be constantly exploring the limits of these powers, which would take him away from his home village more often. This would make him miss his friends and family, adding a new layer of emotion to his character. He'd also have to deal with the envy and fear of others who might see him as a threat because of his powerful eyes. But through it all, Naruto would strive to use these powers for the greater good, and this would shape him into a more mature and respected ninja in the fanfiction world.