Naruto could become more cautious and calculating. Since Kaguya was a very powerful and unpredictable adversary, dealing with elements related to her in the fanfiction might force Naruto to think more before acting. He would still be the same determined Naruto, but he would add a layer of strategic thinking to his usual impulsive nature. His development could also involve learning to control his own power better, as he realizes the potential danger that Kaguya - like power can bring if not properly harnessed.
In the fanfiction, Naruto might develop new skills related to Kaguya's power. As he delves into her story and the nature of her abilities, he could learn to control or even mimic some of her powers. This would not only make him stronger but also change his fighting style. His understanding of the origin of chakra and the world itself would deepen, which could lead to him being more of a philosopher - like figure in the fanfiction. He might start to question the cycle of hatred in a more profound way, seeing how Kaguya's actions were influenced by her own experiences. Also, his relationships with other characters could change. For example, if he discovers that Kaguya had some connection to certain characters in the present, he might treat those characters differently or have a newfound respect for them.
To develop Kaguya further, you could show her relationship with other characters in a new light. Let's say she had a friendship or a mentorship with an unknown character in the past. This relationship could have influenced her actions and decisions. It would also add more depth to her character and make her more relatable. Additionally, you could show how she might adapt to the modern ninja world if she were to return, which would require her to change her old - fashioned ways of thinking.
His understanding of the ninja world would expand. He might become more cautious and calculating in battles, as Kaguya's training could expose him to different strategies. Also, he could develop a more solemn side to his personality, considering Kaguya's own complex nature and the heavy knowledge she might share.
Their relationship could develop through Naruto showing Kaguya the beauty of the modern ninja world. He could introduce her to his friends and family, which would gradually make Kaguya see the value in human connection and change her view on the world.
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.
Naruto would likely become more empathetic. In a harem situation, he has to understand the feelings of multiple people. He would grow in his ability to handle complex emotions. For example, if one member of the harem is sad, he has to be there for her while also considering the feelings of the others.
In a fanfiction, their relationship could develop through shared knowledge. Naruto is curious about the history of the ninja world which Kaguya knows a great deal about. As he asks her questions and she shares her stories, they start to bond. Also, Kaguya could be intrigued by Naruto's determination and his never - give - up attitude. This could lead to a relationship where Kaguya becomes a sort of mentor to Naruto in some ways, while Naruto helps Kaguya to see the good in the current ninja world. Their relationship would then be a mix of learning and mutual admiration.
At first, it might be one of suspicion. Naruto would be wary of Kaguya's power and her past as a sort of villain. But as they face challenges together, they could start to respect each other. Naruto might see the good in Kaguya that was buried under her past actions, and Kaguya could come to admire Naruto's tenacity and his strong sense of justice.
Naruto's character would develop in a very different direction. He'd likely be more stoic and less impulsive. Since Kaguya has a more detached view of the world, Naruto might inherit some of that. He would be more calculating in battles, using his powers in a more precise way rather than relying on his usual head - on approach. His sense of justice might also be warped as he grows up under Kaguya's teachings, which are different from the values he was taught in the original story.
Naruto's relationships with others would be different too. His friends might view him with a mix of awe and caution because of his relation to Kaguya. This could lead to some interesting dynamics, like Sasuke being more suspicious of Naruto at first. But as Naruto grows and shows that he is not like Kaguya in her more villainous aspects, he could earn back their trust in a more complex and character - building way.
Naruto's character could be developed by showing his growth in leadership. When saving Ino's team, he might take charge more confidently compared to his earlier days. For example, he could be seen giving clear instructions to the team during the rescue operation, which shows his development from a reckless kid to a more responsible ninja.