Who could be the main characters in a 'Naruto x Step Up' fanfiction aside from Naruto?

Well, there could be an old butler who has been in the household for decades. He initially doubts Naruto's abilities but later becomes his mentor. And then there could be a group of thieves who target the wealthy household. Naruto has to use his butler skills and ninja skills to fend them off. And perhaps a childhood friend of Naruto's who visits him at the butler job and is amazed at how he has changed.

Well, obviously his sister would be a main character. She could be someone with a very different personality from Naruto. Maybe she's more introverted and focused on her studies or training in a very solitary way. Another character could be Naruto's mentor, like Iruka. He might be one of the few people who actually notice Naruto's struggle of being ignored because of his sister, and try to encourage Naruto in his own way.

Kabuto is also common. He was Orochimaru's right - hand man. In fanfiction, he could be used to either further Orochimaru's plans against Naruto or he could have a change of heart and help Naruto against Orochimaru. His medical skills and knowledge of Orochimaru's secrets make him an interesting addition to the story.

Sasuke could be one of the main characters. He might initially be skeptical about Naruto's plan to rebuild Revan's army but later come around and offer his skills. Another could be Kakashi. His experience and wisdom would be valuable in guiding the new recruits. Sakura too, with her medical skills, could play an important role in taking care of the army members during battles and training.

Sasuke could be a great main character in such a fanfiction. He has a deep connection with Naruto. If Naruto's dying will flame is involved, Sasuke might be on a journey to understand what Naruto left behind and how to carry on his legacy. He could be conflicted between his own past and the new responsibility that comes with the dying will flame.

Jiraiya could be a great addition. Since he was Pain's teacher, his presence could add a lot of depth to the story. He could offer insights into Pain's past and also help Naruto understand Pain better.

I think Hinata would be an interesting character to include. She has her own unrequited love for Naruto. Her presence could add some drama to the story as she sees Naruto getting closer to Ahri. Another good character could be Jiraiya. His lecherous yet knowledgeable self could provide some comical relief and also give some sage advice to Naruto and Ahri when they need it.

Boruto is often a popular character in such fanfiction. Since he also has the Jougan, stories might focus on his training with Naruto to master this power. Their father - son relationship can be explored in new ways as they both deal with the implications of the Jougan.

Sakura could be one. She has always had a bit of a complex relationship with Naruto. In this harem fanfiction, she might see Naruto in a new light and become part of the harem. Another could be Hinata. Given her long - standing crush on Naruto, it would make sense for her to be in the story. Also, Tenten. She's a strong and independent ninja, and her interaction with Naruto could be an interesting addition to the harem scenario.

Sakura could be one. Since she's very intelligent and has strong medical skills, she could help in the process. Maybe she'd be in charge of the clan's medical and research aspects related to the Senju bloodline.