In fanfiction, their relationship can be explored through flashbacks. For example, the Nidaime Hokage could have had an encounter with Naruto's parents long ago, and these memories could be revealed. Another way is by having the Nidaime Hokage's spirit communicate with Naruto, sharing his wisdom and experiences.
One good storyline could be Naruto time - traveling and meeting the Nidaime Hokage. He could learn some long - lost jutsu from him. Another could be a story where the Nidaime Hokage is brought back to life and he has to train Naruto to face a new, powerful enemy. Maybe a story where Naruto discovers a hidden connection between his family and the Nidaime Hokage, like they were part of a secret organization in the past.
One idea could be exploring the Nidaime Hokage's relationships before he became Hokage. Maybe his friendships with other ninja that influenced his leadership style.
Well, it depends on the specific fanfiction. Some fanfictions might explore alternate storylines where Naruto doesn't become the Hokage at all. Maybe he decides to pursue a different path in life, like focusing on being a teacher or an explorer. However, in a large number of fanfictions, he does achieve his goal of becoming the Hokage because it's such an iconic and desired outcome for fans who want to see his journey to the top in different ways.
It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
A great fanfiction idea could revolve around the Nidaime's water affinity being passed down through generations. It could show how his descendants in the Hidden Leaf Village also had an inclination towards water - based techniques. The story could detail their struggles and triumphs in learning and mastering these jutsu, inspired by the Nidaime's legacy.
Sasuke could be an alternative. He has strong ninja skills and a deep understanding of the ninja world. His experiences have made him grow into a very capable person, and his Sharingan gives him an edge in combat and strategic planning.
One possible interesting plotline could be the exploration of the Nidaime Otokage's relationships with other Hidden Villages. Maybe he had secret alliances or rivalries that are not fully explored in the original Naruto series.
In this fanfiction, Hokage Naruto might take Naruto to a special training ground. There, he could teach Naruto some of his own unique jutsu combinations. For example, he could show Naruto how to combine the Rasengan with his Sage Mode more effectively. This would give Naruto a huge power boost and also make him more confident in battles against tougher opponents.