He would most likely meet his father, Minato Namikaze, and his mother, Kushina Uzumaki. These are the two main family members he never really got to know growing up.
In this fanfiction, Naruto might finally have an emotional reunion with his parents. He could share all his adventures, growth, and the pain he endured. They would likely be proud of how he became a great ninja.
It could be Sakura. She has been Naruto's friend for a long time. She would be excited to see him return. They might share a heartfelt reunion, and Sakura could tell Naruto about the medical advancements in the realm while also asking about his adventures away.
In the 'naruto family returns fanfiction', it could be that Naruto's family returns to the village during a time of celebration, like a big festival. But they soon find out that there are some underlying issues in the village, such as political unrest or a new group of villains secretly operating. Naruto then decides to use his influence and his family's combined strength to solve these problems and bring peace back to the Hidden Leaf. He might also use this opportunity to teach his children about the importance of protecting their home and the values of the ninja way.
He might meet Iruka first. Iruka was always like a father figure to Naruto, and it would be a very heartwarming reunion. Iruka would probably be one of the first people to welcome Naruto back with open arms.
There's a good chance he meets Kakashi first. Kakashi was his mentor and they have a strong bond. Kakashi might be out on a mission near the place where Naruto returns, or just be around the village doing his usual thing like reading his book at the training ground.
One possible plot could be that Naruto returns to his family after a long and dangerous mission. He finds that his family has grown and changed in his absence. His children might be having difficulties in their ninja training, and Naruto uses his experiences to guide them. He also reconnects with his wife, sharing stories of his adventures and strengthening their bond.
In this fanfiction, the Naruto family might be welcomed back with great joy. The villagers could hold a big celebration to honor their return. Naruto, as a hero, would finally be home with his family in Konoha, and his kids might start exploring the village that their father has so many memories of.
Naruto is definitely one of the main characters. He is the key figure in the Naruto universe. His family, which includes Hinata, Boruto, and Himawari, are also likely to be main characters. Boruto, with his own dreams and potential, might be facing some internal or external conflicts. Himawari, being the younger one, could be used to show the family's protective side. And of course, other characters from the original series like Sasuke might also make appearances, as he is Naruto's best friend and they have a deep connection.