She might be a spirit that was bound to the village long ago. For some reason, she had a relationship with one of Naruto's ancestors. And now, as Naruto is her son in this fanfiction, he has a responsibility to protect the village in a way that is related to this ghost girl's past connection to it.
The ghost girl could be a long - lost Uzumaki. Since Naruto is an Uzumaki, it would make sense that she is from his clan. Maybe she had some special powers that were lost over time, and Naruto is the key to bringing them back.
The plot might involve Naruto finding out about his mother being this 'ghost girl'. This could lead to a whole new arc where he tries to understand more about his heritage. He could face challenges as the son of a ghost girl, like being ostracized by some in the village who fear the unknown, but he uses this to become stronger and prove himself.
She could be a young woman who died under mysterious circumstances.
It could be a powerful sorcerer. This sorcerer might be trying to capture the Ghost Girl's essence for his own dark magic. He sees her as a source of great power because of her unique ghostly nature.
The term 'ghost horse spirit' usually referred to a young girl with a strange personality, lively and playful, smart and cute. They were often quick-witted and resourceful, able to quickly come up with all kinds of interesting ideas and ideas, and were brave enough to try new things. They would not stick to the rules. When it came to dressing, they usually liked fashionable and unique clothes to show their unique style. The ghost horse spirit girl could often bring joy and surprise to the people around her. She was the joy of life. In the novel " Splendid Garden: The Strongest Farmer Girl," the female protagonist, Shen Yingyue, was a typical ghost girl. Although she was born in poverty, she relied on her intelligence and courage to step towards success. In the face of difficulties and challenges, she was always able to quickly come up with a solution, which made people's eyes light up. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
He could interact with his old sensei, Iruka. Iruka was an important figure in Naruto's life, and as a ghost, Naruto might visit Iruka to give him some comfort or to seek advice. Since Iruka was always there for Naruto when he was alive, their connection could still exist in the afterlife.
Another possibility could be Sakura. Although she had feelings for Sasuke for a long time, in a fan - created scenario, things could have taken a different turn and she could end up in a relationship with Naruto and get pregnant. However, this would be quite a departure from the original plot dynamics.
She could be a kunoichi from a small, unknown village who comes to Konoha on a mission. Naruto, being the friendly and trusting person he is, befriends her. But she has a hidden agenda and uses Naruto's feelings for her own ends, breaking his heart in the process.
Since I don't know the exact 'ghost girl novel', it's hard to say. But surely there would be the ghost girl herself. There might also be a character who discovers her, like a young boy or girl who is curious or brave enough to interact with the supernatural.
Most likely, the main character is the ghost girl herself. She could be a lonely spirit with her own story to tell.
The identity of the Ghost Girl in Pokemon Black and White 2 is not clearly defined. She is just this spooky figure that players encounter in the game.