Well, Naruto has always been very headstrong and determined as a boy. As a girl in this fanfiction, his character could develop in a way that combines his old tenacity with a new - found grace. He might learn to use his femininity as a strength, for example, in the art of deception during missions. His relationships with other characters would also shape his development differently. With his friends, he could learn to rely on them in new ways, and with his enemies, he might be underestimated even more, which could give him an advantage. All in all, his character development would be a fascinating journey of self - discovery and growth in the face of a major identity shift.
It can also make him more empathetic. If he learns about the hardships his ancestors faced, he might better understand the struggles of others. Let's say his heritage reveals that his clan was persecuted. He would then be more likely to stand up for those who are being mistreated in the present. He would grow from a brash, somewhat naive ninja into a more well - rounded and wiser one.
His life would become a lot busier. Taking care of a baby is no easy feat. He'd have to balance his ninja duties with looking after the baby. For example, he might have to cut short his training sessions or decline some missions at first.
His relationships with his friends would become more complex. His friends might be a bit scared or at least unsure about this new side of him. For example, Sakura might be worried about how to approach him now. Sasuke, on the other hand, might see Naruto in a completely different light, either as a threat or as an even more interesting rival. His relationship with the village elders would also be different. They might try to keep a closer eye on him or even isolate him to some extent.
His confidence would probably soar. Knowing he has his parents, who are likely strong ninjas, supporting him would make him feel more secure. He might become a bit less reckless as he now has people who care about him deeply and he wouldn't want to worry them.
His relationship with Sakura would change. Sakura has always respected Tsunade as her mentor. Now, if Naruto is Tsunade's son, Sakura might see Naruto in a more complex way, perhaps with a new level of respect. With Kakashi, he might be more protective of Naruto, knowing he's related to Tsunade. And the other villagers, some who have always been a bit standoffish to Naruto, might start to treat him better as they wouldn't want to cross Tsunade.
He might become more confident. Having Excalibur would give him a new sense of power and purpose. He could be more assertive in his actions and decisions.
If Naruto gets magic in fanfiction, it would likely make him more confident. Having new powers would give him an edge in battles, and he'd feel more capable of achieving his goals. For example, if he could use magic to heal quickly, he'd be less worried about getting injured in fights. This newfound confidence could also change how he interacts with his friends. He might be more assertive in leading them.
It would likely make him question his identity a great deal. He might start to wonder about his biological parents and what traits he got from them. This could lead to a whole new self - discovery journey in the fanfiction.
Naruto might become more conflicted. Since Madara had some extreme views, Naruto would have to grapple with those ideas. He could become more secretive as he tries to understand Madara's motives better without alarming his friends. For instance, he might start training alone more often to study Madara - inspired techniques.
Naruto might become more confident earlier. With a brother by his side, he would have someone to rely on and confide in from the start. This could make him less of an outcast in his own mind and more willing to open up to others in the village.