Since I haven't read it, I can't say for sure. But it might include Naruto and some of his friends as they are central to the Naruto universe. And of course, the character who is proposed as the'real' fifth Hokage.
There's a good chance that the main character would be the one who is seen as the real fifth Hokage in this fanfic. However, other important characters from the Naruto series would probably also be involved. For instance, Sakura could be there, as she is a key figure in the original story. The story might also introduce new characters who are either allies or opponents of the character aiming to be the fifth Hokage. These new characters could bring in new plot twists and storylines related to the power struggle for the position of the fifth Hokage.
The other ninja clans' leaders would be important characters too. For instance, the Uchiha clan leader (if the story is set at a time when the Uchiha were still in the village) could play a role in the power dynamics related to the fifth Hokage. And of course, the Hokage's personal friends and mentors from their younger days.
His friends like Sakura and Shikamaru would surely support him. Sakura, with her medical skills, could be an important part of his regime, providing healthcare for the ninjas. Shikamaru, being intelligent, could offer strategic advice. Also, the younger generation of ninjas who have been inspired by Naruto would be his strong supporters, as they believe in his leadership and the new direction he could take the village in.
I'm not sure specifically as I haven't read this particular fanfic. But generally, it might be about someone's idea of who should really be the fifth Hokage in the Naruto universe, perhaps presenting an alternative story arc or character development related to that.
I think the whole of Team 7 would be in full support. Sasuke might return to the village and support Naruto as he sees Naruto's growth and leadership potential. Kakashi would also be there to guide Naruto as he steps into the role. Additionally, the people of Konoha who have seen Naruto grow from an outcast to a hero would be very likely to support him as their new Hokage.
I think the whole of Team 7 would be behind him. Sasuke, despite his past, would see Naruto's potential as a Hokage and support him in his own way, perhaps by helping to protect the village from external threats. Kakashi, as Naruto's former teacher, would also be there to guide him in the early days of his Hokage - ship.
Another aspect to explore in the fanfic is Naruto Senju's relationship with the other villages. Given his Senju heritage, there might be different expectations and tensions. He could work towards a more equal - footed relationship with other villages, instead of the traditional power dynamics. This would involve a lot of diplomatic meetings and negotiations, which could be full of drama and intrigue.
I'm not entirely sure without reading the fanfic, but it could be Naruto and his friends like Sasuke and Sakura. Since Naruto is aiming for the Hokage position, his friends might play important roles in the story, either supporting him or having their own arcs related to the perks of the Hokage.
Well, it would likely include Naruto himself as he is central to the Naruto universe. Since it's about the Hidden Hokage, he would probably be a main focus.
Obviously, Naruto would be one of the main characters as it's about him becoming the sixth Hokage.
Sakura could be really interesting. As a highly skilled medic - ninja, she could play a crucial role in supporting Naruto as the Fifth Hokage. Maybe she has to deal with a new disease outbreak in the village and has to find a cure while Naruto is handling other threats. Kakashi could also be fascinating. He has a wealth of experience and could act as an advisor to Naruto. He might have some old - fashioned ideas that Naruto has to balance with his own more modern approach.