One way to develop Naruto is to put him in a situation where he has to protect Eri at all costs. This can bring out his most heroic and self - sacrificing side. You can also show his internal struggle if Eri's actions go against his moral code. For Eri Kitamura, you can develop her character by making her face difficult choices. For example, she might have to choose between her loyalty to her own village and her new - found friendship with Naruto. Through these choices, her true nature and values can be revealed and she can grow as a character.
For Naruto, you can explore his post - Hokage days in relation to Eri. Maybe he's more cautious and wise, and he imparts his knowledge to Eri. You can show his growth in handling diplomatic situations if Eri is from another village. For Eri Kitamura, if she's a new character, you can start by giving her a distinct personality. For example, if she's shy, Naruto can help her come out of her shell. Or if she's headstrong, Naruto can teach her the value of patience.
In fanfiction, Naruto's character can be developed further by showing his insecurities when it comes to relationships. Eri could be the one who makes him face these insecurities. For Eri Kitamura, her character can be developed through her interactions with Naruto's friends. If she has a hard time fitting in at first, but then slowly earns their respect. This can show her growth from an outsider to an accepted part of the group. Also, if she has a special skill, like healing, Naruto can encourage her to use it for the greater good, which will shape her into a more selfless character.
One idea could be a story where Naruto meets Eri Kitamura in a different dimension. Maybe Eri has some unique abilities that Naruto has never seen before, and they have to team up to face a new kind of threat that exists only in that dimension. They could learn from each other's strengths and weaknesses along the way.
For Naruto, you can focus on his growth in a different aspect. Since he already has his ninja skills, in a story with Aplessia, he could develop his emotional intelligence further. For example, learning how to better understand Aplessia's more complex and perhaps different emotional range compared to his friends in Konoha. For Aplessia, you can start by giving her a backstory. Maybe she has a troubled past that made her the way she is, and as she interacts with Naruto, she starts to open up and become more confident.
For Naruto, his growth could be shown in relation to Tigress's no - nonsense attitude. He might become more disciplined in his training. For example, he could learn to control his rasengan better by observing Tigress's precision in her attacks. His character could also become more introspective as he tries to understand Tigress's more reserved personality.
For Naruto, you could focus on his growth in a new environment. Since he's in a different world with Natsuhi, he might have to adapt his ninja skills. Maybe he starts to learn some new techniques from Natsuhi's world. For Natsuhi, you could show her becoming more confident. Naruto's presence and his can - do attitude might inspire her to be bolder. For example, if she was shy about using her powers before, she could start to use them more freely.
In fanfiction, Naruto could be developed by having him face new moral dilemmas when interacting with Yubel. His character could grow by learning about different forms of power that Yubel represents.
Towa could be developed by exploring her past. Maybe she has some traumas from her own world. Meeting Naruto and seeing his determination could inspire her to face her past. Also, her relationship with Naruto could soften her hard - edged personality as she becomes more involved with the kind - hearted people in the Naruto universe.
To develop Naruto's character in relation to Anko, he could be put in situations where he has to rely on her. This would make him realize that he doesn't always have to be the one in the lead. Anko could also introduce him to different parts of the ninja world that he hasn't explored yet. For Anko, Naruto could be the catalyst for her to change her somewhat aloof and solitary nature. His friendship could make her more sociable and collaborative, and she could start to see the value in teamwork, which is something Naruto highly values.
Naruto's character in Anbu could be developed by exploring his relationships with his Anbu teammates. He might learn new ways of thinking and fighting from them, and this could affect how he interacts with Ayame. Ayame, on the other hand, could be developed by having her face some sort of danger that forces her to become stronger. Naruto could then be the one to help her train and gain confidence. This would not only strengthen their relationship but also develop her character into a more independent and capable person.
For Naruto, he could develop by learning more about leadership from Tsunade. He already has his own unique style, but Tsunade's wisdom in leading the village could give him new insights. Sakura could develop her medical ninjutsu further under Tsunade's guidance and also become more confident in her combat abilities. Tsunade herself could develop by seeing the new generation, Naruto and Sakura, grow and be inspired to take on new challenges for the village.
For Naruto with Juubi powers, his character could be developed by showing how he struggles to control this new and immense power. In the context of Moka's world, he might become more cautious as he realizes the different nature of threats there. He could also develop new relationships with Moka's friends and enemies, which would shape his character further.