Well, there could be the maids themselves. They might be original characters created specifically for the fanfiction. Each maid could have her own unique personality, like one could be really shy and timid while another could be bold and outspoken.
There could be some new characters introduced. For example, an old hermit who has a deep knowledge of ancient trap - making techniques and teaches Naruto some of his secrets. Also, some of the villains from the original Naruto series might appear, like Orochimaru, who would be intrigued by Naruto's newfound skills and try to either steal them or find a way to counter them.
There could be characters related to Luna. Maybe Luna has some friends or family members who play important roles. Also, the regular Naruto characters like Sasuke and Sakura would still be there, but their relationships with Naruto might change due to his new identity as Luna's son.
Princess Luna herself would be an important character. Also, characters like Sasuke could be there, and their relationship with Naruto might change because of his new heritage.
Obviously, there would be the queen vampire, his mother. She could be a powerful and mysterious figure, perhaps with her own motives and plans for Naruto. There might also be some vampire elders or nobles who play a role in Naruto's life, either guiding him or trying to use him for their own purposes.
Sakura could be a main character. She might be suspicious of the clone at first, thinking it could be a threat to Naruto. But as the story progresses, she could come to understand the clone's situation and even help in its development.
Definitely Sasuke. Their relationship is always a key factor. He could be a reluctant ally, or he might think Naruto's dark side is leading him astray in the rebuilding efforts. Then there's Kakashi. His wisdom and experience could be valuable to Naruto. And Hinata. Her love for Naruto might make her a strong supporter, and she could also use her Byakugan abilities to help in various ways during the rebuilding, like scouting for resources or potential threats.
Iruka sensei could be a significant character. He has a big heart and might feel sympathetic towards the banished OC. He could try to find a way to bring the OC back to the village, or at least offer some moral support. And then there's Shikamaru. His intelligence could be useful in uncovering the mystery behind the OC's banishment or in strategizing to protect the OC from those who want to harm them.
Well, Ino could be one of the potential characters. She is a strong - willed and confident girl who might be attracted to Naruto's positive attitude. Another could be Tenten. She respects strong ninja skills, and Naruto's growth as a ninja might catch her eye. Also, Temari could be a part of it. Given her own strong personality, she might find Naruto's determination and unique charm appealing.
Naruto himself could still be a main character. His relationship with Madara's reincarnation could be explored, like how he tries to understand this new version of an old enemy and whether he can trust him or not.
Sakura could be one. She has a long - standing relationship with Naruto and might be part of the harem. Also, Hinata. Given her feelings for Naruto, she could be drawn into this situation. Shikamaru might also be included, not in a romantic way for Naruto but as a friend who gets involved in the group dynamic. And Kiba, with his brash personality, could add an interesting element to the group.