The OC Greenseer could act as a guide. They might use their visions to lead characters to hidden treasures or safe havens. For instance, they could show a group of refugees the way to a secret valley where they can survive the winter and the war.
Well, for a 'Game of Thrones reincarnation fanfiction', you might consider having Arya Stark reincarnated as a sellsword. She could still retain her skills from her past life, like her ability to change faces and her combat skills. This new Arya could then get involved in various wars and power struggles across Westeros. Also, Jon Snow could be reincarnated in a world where the White Walkers have already won. He has to figure out a way to reverse the situation, using his past knowledge and leadership skills. And Cersei Lannister could be reincarnated as a maester's apprentice, which would give her a whole new perspective on power and politics.
Margaery can also be a symbol of hope or change in fanfictions with a male OC. If the male OC is disillusioned with the current state of Westeros, Margaery could represent a new way forward. Her charm and intelligence can inspire the male OC to support her in her plans to reform the kingdom. Their relationship then becomes a driving force for the plot, as they strive to make Westeros a better place while also dealing with their own personal feelings for each other.
One great 'Game of Thrones' OC harem fanfiction is 'A New Player in Westeros'. It has an interesting original character who forms a unique harem with characters from different houses. The plot is full of political intrigue and romantic elements.
First, you need to have a deep understanding of the original 'Game of Thrones' lore. Know the characters, their backstories, and the world they live in. Then, think about how reincarnation would change them. For example, if a character like Robb Stark is reincarnated, would he still make the same mistakes? Next, create a unique plot. Maybe the reincarnated characters are all brought back for a specific purpose, like to stop an even greater threat than the White Walkers. Also, don't be afraid to deviate from the original story. Make it your own while still maintaining the essence of 'Game of Thrones'.
First, you need to have a clear understanding of the 'Game of Thrones' universe. Know the politics, the different houses, and the cultural norms. For your male OC, give him a unique backstory. Maybe he's from a small village affected by the wars or he has a special skill passed down in his family. Then, create interesting relationships for him. He could be an ally or a rival to the main characters.
One great 'Game of Thrones OC Male Fanfiction' is 'The North's New Son'. It has a well - developed male character who is thrust into the complex politics of the North. He has to navigate the loyalties and rivalries, which makes for an exciting read.
One great male OC bastard fanfiction is 'The Bastard of Winterfell's Rise'. It follows an original character who is a bastard in the North. The story is engaging as it shows his struggle to gain acceptance in a society that looks down on bastards. He uses his wits and combat skills to make a name for himself.
Perhaps an OC Lannister who is a talented healer. In a world full of wars and battles in Game of Thrones, a healer Lannister could be an interesting addition. They might have to deal with the moral dilemma of healing both their own family's enemies and allies. They could also have a secret love affair with a member of another house, which would add a layer of drama.
Love and loyalty also feature prominently. An OC Baratheon might be torn between loyalty to their family and their love for someone from another house. This creates a lot of internal conflict and interesting plotlines. In some stories, an OC Baratheon's loyalty to a friend or a romantic partner can change the course of events in the political landscape of Westeros.