Iruka - sensei could be Naruto's mentor in the star world. He could be the one who discovered Naruto's talent and guided him on his journey to stardom. Iruka - sensei would offer advice on how to handle the pressures of being a star, just like he taught Naruto about being a ninja in the original series.
Sakura could be Naruto's personal physician or his stylist. Given her intelligence and her skills in the original story, she could play an important role in keeping Naruto in top shape for his shows or making him look his best. She would be the one to patch him up if he gets injured during a stunt or a performance.
Sakura could be a main supporting character. As a ninja, she might check on Naruto regularly to make sure he's adjusting well to civilian life. She could also offer medical help if he has any lingering issues from his ninja days.
Shikamaru could be a main supporting character. Since he is friends with Naruto and also from Konoha, he might offer advice to Naruto on how to handle his relationship with Temari. And as someone who has worked with Temari in the past, he can also help bridge any misunderstandings between them.
In many 'Naruto and Hinata Road to Ninja' fanfictions, Kakashi often appears as a supporting character. He has vast experience and knowledge that he can pass on to Naruto and Hinata. Additionally, Rock Lee could be there too. His unwavering determination and powerful taijutsu skills can inspire and support Naruto and Hinata during their journey.
Sakura could be a main supporting character. She might play a role in helping Naruto and Hinata with their relationship, like giving Hinata advice on how to be more assertive with Naruto. Another could be Shikamaru. He's smart and could assist them in strategizing against any threats they face in the 'Road to Ninja' world.
For Naruto's side, Sasuke could be a main supporting character. He might be initially skeptical about Naruto's relationship with Rangiku but eventually comes around. Sakura could also be there, helping with the preparations for the wedding. On Rangiku's side, Ichigo could be a key support. Since he has experience with different worlds, he could help bridge the gap between Naruto's world and Rangiku's. Toshiro Hitsugaya, Rangiku's captain, would also be involved, either reluctantly giving his blessing or being a bit overprotective at first.
😋I strongly recommend the novel Uchiha Sengoku Monogatari to you. The plot is complicated, and there are various characters and backgrounds. It will allow you to truly delve into the core of the ninja world. The main character was a transmigrator who had reincarnated into the Ninja Realm's Warring States Period. He would describe the turbulent times of that era, and from the perspective of the supporting characters, he would completely show the unpredictable changes between the major forces of the Ninja Realm. The supporting roles also included many people, such as Uchiha Banban, Selaiya, Tsunade, Orochimaru, and other characters who appeared more often. They all had their own stories and distinctive characteristics. I hope you like this fairy's recommendation. Muah ~😗
One possible supporting character could be Naruto's friends from Konoha. They might visit Naruto in Konoka's world and be a bit skeptical at first about his relationship with Konoka. Another could be Konoka's family members. Her father, for example, might be initially hesitant about Naruto but then come to accept him. There could also be some local villagers in Konoka's place who become friends with Naruto and help him adjust to the new environment.
Iruka sensei could be another one. He could be the one who encourages Naruto to become a dentist in the first place. He might also bring in students from the Ninja Academy for dental check - ups, which would help Naruto's practice grow. And of course, Naruto's friends like Shikamaru and Choji could also be there. Shikamaru could use his intelligence to come up with efficient ways to manage the patient flow, while Choji could be the one who tries to make the waiting area more comfortable with his love for food, like suggesting the best snacks for patients to have while waiting.
Gaara, Temari's brother, would surely be a significant supporting character. He would be involved in the decision - making regarding Temari's marriage. Hinata could also be a part of it, maybe as a friend to Naruto, offering her gentle support and understanding throughout Naruto's relationship journey with Temari.
Obviously Naruto would be one of the main characters. There might also be some original characters created specifically for this fanfiction that are related to the North and South Star concept.