Iruka could be an interesting character to include. He has always been important in Naruto's life and could provide a different perspective on the Second Hokage's story. Hinata could also be part of it. Her gentle nature could contrast with the more battle - oriented characters. And Rock Lee, with his dedication to hard work and the ninja way, could be inspired by the Second Hokage's own determination and contribute to the story in his own unique way.
Sasuke could also be a possibility for the 6th Hokage in the fanfic. He has grown stronger over the years and his unique perspective on the ninja world could bring new ideas to the leadership of the Hidden Leaf. He might start off as a controversial choice but prove himself through his actions in protecting the village and making tough decisions.
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.
Obviously, the Second Hokage himself should be a main character. His brother, the First Hokage, could also be included, perhaps in flashbacks. Then there could be some of his students, like Hiruzen Sarutobi. The Uchiha clan members might be important characters too, since they play a significant role in the village's history and the Second Hokage had interactions with them.
Fan Xian had killed the Second Prince. In the TV series " Celebrating Years 2," Fan Xian used Fan Wujiu's help to expose the Second Prince's plot and force him to commit suicide. In order to protect the interests of himself and others, Fan Xian adopted a strategy to pull the Second Prince down from his horse and force him to commit suicide. Thus, Fan Xian was the one who killed the Second Prince.
No. In the original Naruto series, Naruto is the son of the fourth Hokage, Minato Namikaze. Fanfics may create alternate universes, but the canonical relationship is that Naruto has no relation to the second Hokage in the official story.
Even Naruto himself could be a subject of this 'evil Hokage' concept in fanfiction. Maybe he is possessed by some dark entity or has a major change of heart due to some extreme event. This would completely change his character and turn him into an evil Hokage, which would be a very interesting and unexpected twist.
Shikamaru is another possibility. He is known for his strategic mind. As Hokage, he could use his intelligence to make wise decisions for the village. He may not have the brute strength of Naruto or Sasuke, but his ability to plan and analyze situations would be invaluable in leading Konoha.