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.
One possible theme could be her struggle with authority. If she's angry, it might be because she's facing issues with those in power over her in the story's universe.
One great Pidge x fem reader fanfiction is 'The Hidden Connection'. It beautifully portrays the relationship development between Pidge and the female reader. The story is set in a post - apocalyptic world where they have to rely on each other. Another one is 'Pidge's Unspoken Feelings' which delves deep into Pidge's emotions towards the reader. It has some really heart - warming moments. And 'A Shared Adventure' is also quite popular. It takes the two on an exciting journey filled with challenges and growing closeness.
An engaging fem reader character can be created by making her have a great sense of humor. If she can make Bambam laugh with her witty remarks, it would be very appealing. Additionally, she should have some goals and dreams of her own. Let's say she wants to travel the world and write about her experiences. This shows that she is an independent and ambitious person, which is very attractive in a character.
I'm not sure where to specifically find 'angry Lin Beifong fanfic'. You could try searching on some well - known fanfic websites like Archive of Our Own. There might be some works there that feature an angry Lin Beifong.
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.
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 popular one is 'Harley Quinn and the Reader: A Gotham Adventure'. This fanfic is exciting as it takes the reader on a journey through Gotham's underbelly with Harley. The author's description of the city and the interaction between Harley and the fem reader makes it a must - read. There are some really intense action scenes and some heart - warming moments too.