In addition, there could be new villains emerging, like a powerful earthbender who has gone rogue and wants to prove himself by defeating Lin Beifong's daughter. This villain could have a different ideology about earthbending and see the daughter as a symbol of the old way that he wants to change.
The plot could revolve around her relationship with Lin Beifong. There could be times when they don't see eye - to - eye, for example, if the daughter wants to take a different path in life than what Lin has planned for her. It could also show how Lin tries to protect her daughter from the dangers of their world while also allowing her to grow and become independent.
A common theme is friendship. The OC often becomes a close friend to Lin, helping her through tough times or just being there to have a good chat. For example, an OC might be someone who Lin meets during her police work and they form a bond over their shared sense of justice.
A strong and noble character like Mako could be a great love interest. He has his own sense of justice and duty, which could match Lin's. They could bond over their shared experiences in the police force and protecting the city. Their relationship could start as a mutual respect for each other's skills and then develop into something more romantic as they get to know each other on a deeper level.
There's no way Naruto can be the father of Lin Beifong in any legitimate sense. The two characters belong to entirely separate fictional settings. Naruto has his own story in the Hidden Leaf Village with his family ties related to Konoha. Lin Beifong, on the other hand, is an important part of the Avatar world's Republic City. Their abilities, cultures, and storylines are so distinct that it would be a very odd and non - canon pairing in fanfiction.
Maybe there are new dark forces emerging in the Magic Dimension. These new enemies could be jealous of the daughter's powers or simply want to disrupt the peace in the realm. They might try to corrupt her or turn her against her friends and family. They could use mind - control spells or create illusions to deceive her. And because she is still young and inexperienced, she might be more vulnerable to their attacks at first. But as the story progresses, she would learn to overcome these challenges.
A new dark wizard could rise. This wizard might be jealous of the fame and power that Harry has, and seeing his daughter as an extension of that, decides to target her. Maybe this new dark wizard is seeking to gain control over the wizarding world and sees her as a key obstacle in his path.
The First Order could still be a threat. They might see her as a symbol of the Resistance and try to eliminate her. Or it could be a new Sith cult that has risen in the ashes of the old Sith order.
There could be a new dark wizard or witch who is jealous of the Potter family's legacy. They might target Harry Potter's daughter to try and bring down the family name and prove their own power.
It could be an original character created just for the fanfiction. Maybe a mysterious ninja woman who crossed paths with Kakashi during a mission and they had a brief but intense relationship.
One possible plot could be that Lin Beifong, who is often seen as a tough and independent character, meets someone unexpectedly. Maybe it's a new recruit in the police force who is initially intimidated by her but later sees her vulnerability. He starts to bring her small gifts like her favorite tea and they gradually start to open up to each other, sharing their past traumas and fears. This new relationship helps Lin to soften her hard exterior and she starts to enjoy life more outside of work.