The female cell could introduce an element of mystery to Naruto's character. Others might sense a change in him and be curious or even suspicious. This would force Naruto to confront how he is changing and whether he wants to embrace or resist these changes. It could also lead to him having to hide certain aspects of his new self, which would add a new layer of complexity to his character.
Cell's self - image would be a major factor in her character development. She would have to deal with how others perceive her as a female and also how she perceives herself. This could lead to her evolving in ways that are very different from the male Cell. She might focus more on her appearance or use her femininity as a tool, either for good or bad, which would add new layers to her character.
First, the fox tail could make Naruto more in tune with her instincts. As it is a part of Kurama, it might enhance her natural senses. This would impact her character development as she becomes more aware of her surroundings and the intentions of others. Secondly, having the tail could bring out a more protective side in Naruto. She would feel a stronger sense of responsibility towards Kurama and the power the tail represents. This could lead to her making more selfless decisions and growing as a person. Also, the tail could cause Naruto to be more of an outlier in the village, which would force her to develop a thicker skin and become more independent in her thinking and actions.
Cell's regeneration ability could be given to a character in Naruto. For instance, if Sasuke had this power, it would make him even more formidable in battles. He could lose an arm and quickly regenerate it, just like Cell.
Sasuke might be initially cautious. He would observe Cell carefully to assess his threat level. He could offer his Sharingan - enhanced perception to help Naruto in the fight. Sakura, she would be worried about Naruto but also ready to jump in and heal any wounds. Shikamaru might be thinking of strategies in the background, trying to come up with a way to outwit Cell using his intelligence.
Maybe the female cell comes from an ancient and powerful clan. Naruto has to figure out how to control this new power within him without being consumed by it. He could go on a journey to learn more about the origin of the cell and in the process, meet new characters related to that clan.
It could make her more confident. Wielding the Tobiumei gives her an edge in battles and makes her realize her own potential more. For instance, if she was previously doubting herself, the power of the Tobiumei shows her that she can be a great ninja.
Itachi's influence would make Naruto more empathetic towards the Uchiha clan. He would understand their side of the story better. This would change his approach to dealing with the conflicts related to the Uchiha. Also, Naruto would be more skilled in stealth and strategy. Itachi's training would focus on these aspects, and Naruto would develop into a more well - rounded ninja, with both power and finesse.
Well, in such a fanfiction, Naruto might become more self - reliant. Since he's being neglected by Kakashi, he has to find ways to train and grow on his own. This could lead to him developing a tougher exterior and being more determined to prove himself.
The pet fox can be a source of comfort for Naruto, especially when he faces difficult times. This can help him stay positive and not be so easily discouraged. When others might doubt him, the presence of the fox gives him the strength to keep going. It also might force Naruto to be more strategic. Since the fox has its own abilities, Naruto has to learn how to best utilize them in different situations, which in turn hones his strategic thinking skills and contributes to his overall character growth.
Well, it could have a huge impact. If Kushina hurts Naruto in the fanfiction, it might make Naruto more distrustful. He could become more withdrawn and have to work harder to build relationships later on.