Fem Naruto might develop a more motherly or nurturing side. Kushina was known for her strong personality and also her love for her family. Fem Naruto could inherit some of these traits and become more protective of her friends, almost like a mother figure to them. This would be a significant change from the original Naruto's character in some aspects.
One possible development is that Fem Naruto could face more internal conflict. She has to deal with the expectations that come with looking like Kushina. People might expect her to act a certain way or have certain abilities. This could lead to her either trying to live up to those expectations or rebelling against them, which would be a major part of her character development journey in the fanfiction.
Naruto could develop a stronger sense of responsibility. He is marrying Kushina, so he has to take care of her and think about their future. This might lead to him being more cautious in his actions. Kushina, on the other hand, may develop a more open - minded attitude. She might start to accept new ideas and ways of life that Naruto brings to her.
One possible development for Naruto is that he begins to show signs of leadership. Even as a baby, he might gather the other village kids around him and lead them in some small play - adventures. For Kushina, she could develop a more nurturing side. She might start to think more about the well - being of the whole village because she realizes that Naruto will grow up in this environment. So, she could be involved in activities that improve the living conditions in the village, all because of her love for Naruto.
Kushina, on the other hand, might experience a loss of agency which could lead to her character growing in different ways. She could fight against Naruto's control, which would show her strong - willed nature. Or she could come to accept it and use it as an opportunity to guide Naruto in a different way. There could be a role reversal of sorts where she becomes the voice of reason in Naruto's head. And this could lead to a very different kind of relationship between them compared to what we know from the original story.
Naruto could become more confident. With Kushina as his maid, he'd have someone who truly believes in him at home all the time. He might grow out of some of his insecurities faster. For Kushina, she could develop a new sense of purpose. Instead of just being a memory or a lost hero, she's actively involved in Naruto's life again.
One possible character development could be Naruto's role as an older, more established figure. Instead of being the young, energetic hero, he would be more of a father figure. His attitude towards the village and his comrades might be more paternal. He might be more focused on protecting Kushina and guiding her, rather than going on adventures as in the original story.
In a fanfiction, Sakura could develop her leadership skills. If she and Kushina are in a situation where they need to lead a group, Sakura could learn from Kushina's natural charisma. Kushina could also develop her relationships with the new generation. She could start to see the potential in Sakura and other young ninjas and become a mentor figure, which would be a new role for her compared to her previous life.
In this fanfiction, Naruto might experience some significant character development. He could initially be very confused and conflicted about the situation. On one hand, he has his mother as a servant, which is a strange and uncomfortable idea. This could lead to him being more introspective. As time goes on, he might start to see Kushina's value in a new light, not just as his mother but as someone who is loyal to him in this new role. This could make him more empathetic towards others in servant - like positions. He may also become more decisive in his actions, as he now has someone directly under his authority and has to make decisions regarding Kushina's tasks and well - being.
In this fanfiction, Naruto could develop his skills in a new way. Since he is dealing with a banished Fem Kyuubi, he may have to learn different ways to communicate and work with her. This could lead to him becoming more adaptable. The Fem Kyuubi might develop from a vengeful being into one who is more forgiving. She realizes that not all humans are bad through Naruto's kindness, and this changes her view of the world and herself.
She could become more confident in her new identity. Starting as Harry from a different world, she'd have to adapt to being a ninja and Naruto's sister. This new role would force her to step out of her comfort zone and grow. For example, she might have to learn physical combat skills which she didn't rely on as much in the wizarding world.
One possible plot development could be that Kushina's spirit somehow manages to break through the boundaries between the afterlife and the living world. She then tries to communicate with Naruto, perhaps through dreams at first. This could lead to Naruto starting to search for a way to bring her back permanently, involving him in some sort of ancient and dangerous ritual that he discovers in some long - forgotten scroll.