Naruto would likely be very conflicted. He is a person who values family deeply, so fighting his sister would go against his nature. This could make him seem more hesitant in the fight, constantly looking for a way to end it without hurting her too much.
His normally upbeat and determined personality might take a hit. He could become more somber and introspective. The fight with his sister might make him question his own path and whether he has been neglecting his family in his pursuit of being a hero. He would be less likely to make his usual jokes and more focused on trying to understand why his sister is against him and how to fix it.
On the other hand, his abandonment could fuel his determination in a different way. He might be even more driven to prove himself, not just to the village that shunned him as an orphan, but also to himself. He could see his abandonment as a reason to show that he doesn't need anyone's pity or help, and become an even stronger ninja as a result.
If Naruto has a sister in the fanfiction, Sasuke might see her as another connection to Naruto. He could initially be suspicious of her, thinking she might be a liability to Naruto. But as time goes on, if she proves herself to be strong, Sasuke might respect her. Their relationship could also be a source of some jealousy for Sasuke, as Naruto might spend more time with his sister.
He could become more protective. Since Kiva's powers are powerful, Naruto might feel a greater sense of responsibility to protect his village and friends. He might also be more secretive about his new powers, at least until he fully understands them. And his sense of humor might change a bit, becoming a bit darker or more sarcastic as he gets used to his new identity as someone with Kiva - like abilities.
Naruto's personality might still shine through even as an Arrancar. He's always been determined and kind - hearted. However, he could become a bit more solitary at first as he adjusts to his new form and powers. The Arrancar nature might make him more cautious in some ways, but his basic values of friendship and protecting the weak would remain. He might also develop a bit of an edge, as Arrancars are often seen as more menacing, but it would be a surface change. Deep down, he'd still be the Naruto who wants to bring peace and joy to his village.
It could bring them closer. Having to learn and speak English together would mean they rely on each other more. They would share the struggles and the joys of mastering a new language, which would strengthen their bond.
Naruto's personality would be a complex mix. On one hand, he might become more reserved due to Vader's influence. But on the other hand, his natural inclination towards goodness might cause him to constantly struggle against Vader's darker teachings. He could be a much more conflicted individual, with his usually open - hearted and friendly personality warped by the dark environment he was raised in. He might be more secretive and less trusting of others as well.
Naruto might become a bit more confident and cocky. Shego is often shown as self - assured, and having her powers could make Naruto feel more powerful. He might start showing off a bit more during battles.
Regarding his friends, Naruto with Minato's personality would have a different dynamic. His bond with Shikamaru, for instance, would be more about intellectual exchanges. They would probably plan strategies together more smoothly. His relationship with Hinata would also change. Instead of Naruto being the energetic and somewhat clueless one about her feelings, he would be more perceptive. He would pick up on her signals earlier and handle their relationship in a more refined way. And with the other Konoha 11, he would be more of a guiding figure, much like Minato was for his generation.
Naruto's personality might become more serious. Since Asura Otsutsuki is from an ancient and powerful clan, his influence could make Naruto more aware of the greater responsibilities and the bigger picture in the ninja world.
His core Naruto - like personality of being determined and never - giving - up would still be there. But he might become more refined and elegant like the elves. He would probably have more patience due to the elven influence. His boisterousness might be toned down a bit, but he would still be the energetic Naruto at heart, just with a more elven - like exterior in terms of behavior.