I think all three are great in their own ways. Naruto is the heart of the story, his optimism and determination are infectious. Sakura has the potential to be a complex and strong female character. She can have her own character arc that is independent yet related to Naruto and Tsunade. Tsunade, with her long history and powerful abilities, can be a source of both conflict and resolution in the fanfictions. For example, her past experiences can create interesting plot twists when combined with the current situations of Sakura and 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.
There might be a fanfiction where they are all involved in a medical emergency. Since Tsunade is a great medical ninja and Sakura is her apprentice, and Naruto is always in the thick of things. They have to work together to save a village from a mysterious illness. It would be full of drama and moments of them relying on each other's skills.
The plot could involve a mystery in the village. Strange things start happening, and Naruto, Sakura, and Tsunade have to work together to solve it. Along the way, they face various challenges, and their individual skills and teamwork are put to the test. They also learn more about each other's pasts and how it relates to the current mystery.
One great 'Naruto and Tsunade Fanfiction' is 'The Mentor and the Student'. It explores Tsunade's role in Naruto's growth further. It shows how she not only teaches him medical ninjutsu but also imparts wisdom about leadership. Another one could be 'A Different Bond' which delves into their relationship in a more emotional way, showing how they support each other through tough times in the village. There's also 'Naruto and Tsunade: The Unseen Alliance' which creates unique adventures for them that are not part of the original storyline.
In some fanfictions, a time - travel plot could be involved. For example, Sakura and Tsunade are sent back in time and have to deal with the early days of the Hidden Leaf Village. They meet a younger version of Naruto's parents and play important roles in shaping the future, which also has a significant impact on Naruto when they return to their own time.
One common plot is a training arc where Tsunade trains Sakura further in medical ninjutsu and combat skills, with Naruto sometimes getting involved as a sparring partner or for moral support.
I would recommend 'Tsunade's Legacy: Sakura's Growth'. It beautifully portrays how Sakura evolves under Tsunade's guidance. It has great action scenes and also some heart - warming moments between the two.
One great Sakura Tsunade fanfic is 'The Healer's Legacy'. It shows how Tsunade trains Sakura to be an even better medical ninja. Another is 'Sakura's Mentor', which focuses on their day - to - day interactions during Sakura's training. 'Tsunade's Apprentice' is also worth reading as it delves deep into Sakura's growth under Tsunade's wing.
One great 'Naruto x Tsunade' fanfiction is 'The Bond Beyond Age'. It explores their relationship in a unique way, focusing on how Naruto's determination affects Tsunade. Another is 'A New Path', which delves into a scenario where they team up for a special mission and their bond deepens during the process. And 'Unlikely Allies' shows their interactions in a post - war Konoha setting, highlighting their mutual respect.
One great fanfiction could be where Kakashi and Tsunade team up for a dangerous mission. In this story, Kakashi's Sharingan skills and Tsunade's medical ninjutsu and brute strength combine in a really cool way. They face off against a powerful enemy who is threatening the Hidden Leaf Village. It shows their different personalities - Kakashi's calm and calculated nature against Tsunade's more fiery and impulsive side.