Tsunade can be developed in terms of her vulnerability. As the Hokage, she is often in a position of power and authority. But in this fanfic concept, being ticklish reveals a more human and approachable side of her. She may become more open to Naruto's antics and show a softer side that she usually keeps hidden. This can also lead to her trusting Naruto more and sharing more of her thoughts and feelings with him.
Naruto could be developed by having him face moral dilemmas that Tsunade has already experienced. Tsunade can guide him through these, and in the process, Naruto becomes more mature and worldly. Tsunade's character can be developed by Naruto challenging her traditional ways. For example, Naruto might suggest a new approach to handling village finances or medical training, which forces Tsunade to adapt and grow. This interaction would make both characters more three - dimensional in the fanfic.
One possibility is that there's a mission where Naruto and Tsunade are paired together. Along the way, Naruto gets into some mischief and tries to tickle Tsunade to cheer her up when she's feeling stressed about the mission. Tsunade initially acts annoyed but then realizes it's all in good fun. This could also be a way for Naruto to bond more with Tsunade on a personal level, rather than just as the Hokage and a ninja.
Perhaps a shared experience like fighting a common enemy could bring them closer. If they are in a battle together and Naruto saves Tsunade's life, or vice versa, it could be the start of a deeper emotional connection. Tsunade might then open up about her family to Naruto, and Naruto could share his own feelings about family, as he has always longed for one.
Naruto, being sub in this fanfiction, could develop a deeper sense of respect for Tsunade's experience and wisdom. He might become quieter in some ways, observing and learning from her more. Tsunade's personality can be developed to have a more possessive streak towards Naruto due to her dominant role. But at the same time, she'll also have to deal with her own insecurities about whether she's being too overbearing. This can lead to a more multi - faceted development of her character as she tries to balance her feelings and actions towards Naruto.
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, his nurturing side would really come out. He'd be the one constantly trying to cheer the baby up, making funny faces and using his positive energy. His impulsive nature might also lead him to make some hasty decisions about the baby's care, like trying a new food without thinking it through.
In a Naruto harem fanfiction with Tsunade, one aspect to consider is the power dynamics. Tsunade is a powerful Hokage, and Naruto is also extremely powerful. Their relationship could be based on mutual respect for each other's strength. Maybe in the story, they start off as comrades in battle and slowly develop deeper feelings. As for the harem part, it could be that Naruto's heroism and charm draw in different female characters. Tsunade might be a bit hesitant at first due to her age and position, but Naruto's unwavering nature could break down those barriers.
In a fanfiction where Naruto is Tsunade's son, his training regime would be very different. Tsunade would likely push him hard in both physical and medical training. Naruto might have access to resources that he didn't have in the original story. For example, he could study ancient Senju clan jutsu from a young age. His appearance might also be different, perhaps having some of Tsunade's features. His hair color or eye shape could be influenced by her genetics. Moreover, the village's perception of him would change. People would see him as not just the Jinchuriki of the Nine - Tails, but also as Tsunade's heir, which could bring both advantages and disadvantages in terms of how they interact with him.
I think the idea of a 'tsunade suck naruto fanfic' can be seen as a form of creative exploration. In fanfic, we can see characters from different angles. Maybe the writer has a unique take on Tsunade's actions or personality in relation to Naruto. But it also runs the risk of upsetting fans who have a positive view of Tsunade. Overall, it's part of the diverse world of fanfiction where different voices and ideas can coexist, as long as it doesn't cross the line into being disrespectful or offensive to the overall Naruto fandom.
There might also be other characters involved, like Sakura. Since she was Tsunade's apprentice, she could be part of the story. Maybe she's caught in the middle when Tsunade has to take some action regarding Naruto. Also, Kakashi could be in the fanfic. He has a close relationship with Naruto and might be affected by whatever Tsunade does to Naruto or be involved in the events that lead to Tsunade's actions.