Well, Naruto might grow in his ability to handle complex situations. Hypnotizing Tsunade is no small matter. He has to deal with the consequences, and this could make him a more mature ninja. As for Tsunade, she could have a new perspective on Naruto. Before, she may have seen him as just a young, rambunctious ninja. But after this incident, she realizes his power and potential, and their relationship could evolve into more of a mentor - mentee relationship where she actively guides him in his ninja journey.
Naruto could develop more maturity under Tsunade's influence. Tsunade, being an experienced and strong - willed character, can teach Naruto how to better control his emotions in difficult situations.
One possible plot development is that Tsunade could step up her efforts in uniting the other villages. Since Naruto was a symbol of hope and unity, his death might prompt Tsunade to work even harder to prevent further chaos among the ninja villages. She could initiate more diplomatic meetings and treaties to ensure peace in Naruto's memory.
A plot could develop where Naruto and Tsunade try to keep the pregnancy a secret at first. As the pregnancy progresses, it becomes harder to hide. Naruto may start to train even harder to prove himself worthy of being a father and to protect his unborn child. Tsunade, on the other hand, might face challenges from the medical community as her pregnancy at her age could be considered high - risk. And there could be a rift in their relationship as they deal with the stress and the different ways they approach the situation.
Tsunade's character might experience a softening as she anticipates motherhood. She could become more in tune with her emotions and less guarded. Dan, in this process, could develop into a more patient man, especially when dealing with Tsunade's mood swings during pregnancy. He would also likely become more of a home - body, focusing on building a stable family environment.
For Sakura, it could be a sign of her growing confidence and equality with Tsunade. If she initiates the kiss, it shows that she has come a long way from being a shy apprentice. She is now bold enough to express her feelings, whether it's a platonic deep love or something more complex. For Tsunade, it might make her more vulnerable. She has always been seen as a tough leader, but this moment could show that she has a soft side that she only shows to a select few, like Sakura.
One possible plot development could be that Tsunade trains Naruto more intensively in medical ninjutsu. Since she's his grandmother, she might feel a stronger obligation to pass on her skills.
In an 'Aizen hypnotizes Ichigo' fanfic, the plot could start with Aizen having some grand scheme that requires Ichigo's cooperation, which he obtains through hypnosis. Ichigo might be made to believe that he is on Aizen's side and is working towards a 'greater good'. Meanwhile, characters like Rukia or Urahara could suspect something is wrong with Ichigo. As the story progresses, there could be a series of battles and mind - games as the good guys try to rescue Ichigo from Aizen's control. There could also be some exploration of the nature of hypnosis in the Bleach universe and how it affects Ichigo's psyche.
For Naruto, he could develop more understanding of the darker side of the ninja world through his interactions with Tayuya. Tayuya, on the other hand, might start to see the value of friendship and loyalty like Naruto has. For example, Naruto's unwavering belief in his friends could rub off on Tayuya, making her question her previous solitary and somewhat ruthless ways.
Anko might develop a softer side through her interactions with Naruto. She has a tough exterior due to her past, but Naruto's unwavering optimism and kindness could start to break down her walls. She could become more open and trusting towards others in general.
There could also be a more competitive dynamic. Mei and Tsunade might be competitive in terms of who is more powerful or who can better guide Naruto. Mei could show off her skills in front of Tsunade to prove that she is a worthy ally. Tsunade, not wanting to be outdone, would display her own strength. Naruto would be caught in the middle, trying to keep the peace and also learning from their competitive display. Eventually, they would realize that their competitiveness can be channeled into a positive force for the greater good of the ninja world.