In this fanfiction, Obito's development can be quite interesting. He may begin with his own motives that are not entirely pure. However, as he spends more time with Naruto, he starts to see the world through Naruto's eyes. This could lead to him becoming more empathetic towards others in the ninja world. For example, he might start to understand the importance of protecting the village and its people, just like Naruto does.
Often in the 'Obito takes care of Naruto' fanfiction, Obito's character development is a central aspect. At first, he may be somewhat aloof and guarded. But Naruto's infectious energy and determination begin to change him. He might start to question his own past actions and beliefs. As he takes on the role of caretaker, he gradually becomes more open - minded. He could end up becoming a mentor - like figure to Naruto, having grown himself in the process, learning valuable lessons about love, friendship, and the true meaning of being a ninja.
The story could develop with Obito training Naruto in his own way, away from the values of the Hidden Leaf. Naruto might grow up with a different set of skills and a different view of the ninja world. There could be a lot of internal conflict in Naruto as he discovers the truth about his origins and the fact that he was taken from his village. This could lead to a showdown between Naruto and the Hidden Leaf at some point, or Naruto might try to find a middle ground between Obito's teachings and his own sense of right and wrong.
Naruto's character could develop a deeper sense of responsibility. Saving Konan from Obito would show that he is not only protecting his close friends from Konoha but also those from other villages. This would expand his view of what it means to be a hero.
Naruto might develop a more cynical view of the world at first. Since Obito is involved in his 'founding', there could be darker elements in his upbringing. He may start off being more distrustful of others. However, as he discovers the truth about Obito's actions, he could use that knowledge to grow into a more complex and empathetic character, different from the naive but positive Naruto in the original story.
One unique plot point could be Obito teaching Naruto some of his own special jutsu that he developed during his time as a rogue ninja. Another might be Obito using his knowledge of the darker side of the ninja world to protect Naruto from certain threats that the normal Konoha ninja might not be aware of.
The story could start with Naruto finding Obito in a desolate place. Naruto would be curious and approach him. Then, they would exchange words, and Naruto would offer his help to Obito. As they interact more, they might face some small - scale battles together against rogue ninjas or other threats. This would build trust between them.
Naruto's character would likely be more complex. He'd be less naive perhaps. Growing up with Obito and Rin, he'd have a different understanding of the ninja world. He might be more secretive too, as Obito has his own secrets.
Naruto's character would likely be more edgy. With Obito's influence, he might be quicker to question the village's motives. He'd also be more powerful in different ways, like having a better understanding of space - time ninjutsu early on.
Obito's influence would likely make Naruto more aware of the darker side of the ninja world. Naruto is usually very optimistic, but with Obito's guidance, he would see the hardships and betrayals that can happen. For example, Naruto might become more cautious in his trust of others.
Their relationship could begin with a misunderstanding. Maybe Female Obito has a mission that initially seems to conflict with Naruto's goals. However, as they communicate more, they realize they are actually on the same side. This leads to them working together closely. As time passes, Naruto's positive attitude rubs off on Female Obito, and she becomes more open and friendly. They could eventually become like family to each other, always having each other's backs.
In a fanfiction where Naruto becomes Obito, it could be due to an outside force. For example, an ancient evil entity that wants to disrupt the balance of the ninja world. It targets Naruto and messes with his mind, implanting Obito - like thoughts and desires. Naruto would then struggle between his original self and this new, Obito - influenced persona, leading to many internal and external conflicts within the story.