In this type of fanfiction, their relationship could be developed through Naruto finding a way to communicate with Kushina's spirit. Through this communication, Kushina can share her experiences of being neglected with Naruto. Naruto, in turn, can tell her about his own struggles. This exchange of experiences can create a stronger bond between them, and Naruto can then strive to make sure that no one else in the village feels the neglect that they did.
Their relationship could be developed through shared experiences. For instance, they could go on a mission together where they face a powerful enemy. During this mission, they would have to rely on each other's skills, which would deepen their bond.
It could be developed through a series of events where Kushina tries to make amends. She might leave little signs or messages for Naruto, showing her love and regret. As Naruto starts to notice these things, he becomes curious about her true intentions. Eventually, they have a face - to - face encounter where Kushina explains everything. Naruto, seeing her sincerity and the love she has for him, forgives her, and they start to build a new, stronger relationship based on honesty and understanding.
Their relationship could start with Kushina being curious about Demon Naruto's powers. This curiosity could lead to them spending more time together and gradually building trust.
They could go on a mission together in the fan fiction. During this mission, they face challenges that force them to rely on each other and understand each other's strengths and weaknesses. For example, Kushina might be strong in sealing jutsu and Naruto in his Rasengan techniques, and they combine their skills to defeat the enemy.
For Naruto, you could show his growth in terms of his leadership skills when he's with Naruko and Kushina. He could learn to be more patient and understanding, especially when Naruko might have a different approach to things. For Naruko, her character could be developed by showing her struggle to be recognized in a world where Naruto already has a reputation. Kushina could be developed by exploring her motherly side more deeply, as she interacts with both Naruto and Naruko.
In fanfiction, the relationship might start with curiosity. Kushina could be curious about Naruto's demon side. She starts to study it and in the process, gets closer to Naruto. As she helps him understand and control his powers better, they become friends. Then, as they spend more time together, they realize they have feelings for each other that go beyond friendship. They support each other through difficult times, like when Naruto has to face the negative aspects of his demonic form, and Kushina has problems in the village. This continuous support deepens their relationship.
They could be involved in a cross - dimensional adventure. Maybe Naruto accidentally opens a portal to a dimension where Kushina is still alive but in a different situation. They then have to adapt to this new world together and in the process, their relationship evolves. It could involve learning new skills from each other and facing strange creatures. Also, their communication could be a key factor. If Naruto starts to communicate with Kushina in a different way, like through a special Uzumaki - only form of telepathy, it would be a unique aspect of their relationship development.
He might start to rely on his friends more. For example, Sasuke and Sakura could become his main source of emotional support. He would focus on training with them and sharing his feelings, which in turn helps him to grow stronger and more independent.
A good way is to put them in a situation where they have to rely on each other's strengths. Kushina's speed and chakra control combined with Issei's unique powers can create a synergy. As they see how well they work together, it can lead to a deeper connection, like a mutual admiration that blossoms into a strong friendship or more.
Naruto can be developed uniquely by showing his struggle to balance his normal ninja life with the new dynamic of having a fem Kyuubi around and his mother Kushina. He might develop new fighting styles that combine his Uzumaki heritage, his training, and the fem Kyuubi's powers. Kushina could be developed as a sort of mediator between Naruto and the fem Kyuubi. She uses her past experiences to guide them. The fem Kyuubi can be developed by having her adapt to the human world more, learning about emotions like love and friendship from Naruto and Kushina.