Iruka - sensei would be a likely candidate. He has always seen the potential in Naruto and has been like a father figure to him in some ways. He might advocate for Naruto's early graduation because he believes Naruto has what it takes. Also, Kakashi - sensei could be another one. He has seen Naruto's growth and determination during their training sessions and might think that Naruto is ready to move on to the next level earlier than others.
Sakura might be a character who supports Naruto's early graduation. Despite their initial rivalry, she has seen Naruto's growth and how hard he works. She could speak up for him to the teachers. And Shikamaru, who is lazy but also very perceptive, might see the benefits of Naruto graduating early. He might realize that Naruto's unique skills and determination could be put to better use as a full - fledged ninja rather than being held back in the academy. He could use his influence among the students and teachers to support Naruto's case.
Well, in some fanfictions, Naruto's early graduation might be tied to a prophecy. For example, there could be an ancient prophecy that states a young ninja with a special chakra (like Naruto) must graduate early to start training for a great battle. So, the village decides to accelerate his training. Or perhaps Naruto discovers a new jutsu that is so powerful and unique that the teachers think he's ready to graduate early and become a full - fledged ninja to better utilize this new power.
It could make their peers jealous. For example, characters like Shikamaru might feel that Naruto and Sasuke are getting special treatment. But for their mentors, it could strengthen the bond. Kakashi might have more faith in them and train them more intensively. And for Sakura, she might be both proud and a bit envious of Sasuke's early graduation.
His relationship with Sasuke could be affected. Since Naruto is graduating early, Sasuke might see him as more of a rival. Sasuke, who is also very ambitious, could feel pressured to catch up. This might lead to more intense sparring sessions between them.
Obviously, Naruto and Jiraiya are going to be the main characters. Naruto, the young and energetic ninja - in - training, and Jiraiya, the experienced and somewhat eccentric sage. There might also be some side characters like the villagers of Konoha who could react to Naruto's new relationship with Jiraiya.
Twilight Sparkle would surely be one of the main characters. She's always been a central figure in the Equestria Girls series. Rainbow Dash is also likely to be there. Her energetic and brave nature would add a lot to the graduation story. And of course, Fluttershy, with her gentle and kind personality, would be an important part as well.
Yes, there are likely fanfictions with that theme. You can check popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Naruto is a Senju Graduation' on their search bars and you might find some interesting reads.
Definitely Iruka. He has seen Naruto grow up and has always supported him. Then there's Shikamaru. He's smart and he can see Naruto's value. He might support Naruto even if it goes against the village's decision at first. And of course, Kakashi. He has mentored Naruto and knows his potential, so he could be in Naruto's corner in these fanfictions.
Sakura might support Naruto. Despite the exile, she could believe in his innocence and try to find ways to help him. Also, Kakashi, who has always had a connection with Naruto, would be likely to support him. He might secretly provide Naruto with some resources or training advice.
Sasuke could be one of the characters to support Naruto. They have a deep bond, and Sasuke might understand Naruto's reasons for wanting to change Konoha. Also, Shikamaru, being a smart strategist, might see the potential in Naruto's plan and choose to support him.
Sasuke could be one of the characters to support Naruto. Given their complex relationship and Sasuke's own issues with Konoha in the past, he might see Naruto's cause as just. Another one could be Jiraiya. If he were alive and found out about the real reasons behind Naruto's revenge, he might side with Naruto as he always cared for him deeply. Also, some of the outcast ninja within Konoha, like those who have been discriminated against because of their bloodline or lack of skills, might support Naruto as they also have grudges against the village system.