Another possibility is Cersei and Jaime. Their relationship is already very complex and twisted. In a fanfiction, it could be a different take on their relationship where Jaime is seen more as a king - like protector to Cersei, and she finds herself in his arms in a more tender and loving way than their usual dynamic in the show.
The king, of course, would be one of the main characters. It could be any of the kings from the 'Game of Thrones' universe, like Joffrey, who was cruel and unpredictable, or perhaps a more noble king like Stannis. The other main character would likely be the person in the king's arms. This could be a new character created for the fanfiction, or it could be an existing character from the show or books, like Sansa who was often at the mercy of different lords and kings.
It could be about a character finding solace and protection in the king's arms. Maybe a love story between a commoner and the king, defying the odds and social hierarchies in the brutal world of Game of Thrones.
Well, it could be about a character finding love and protection in the arms of a king. Maybe a commoner girl who catches the king's eye and is then thrust into the dangerous and glamorous world of the court.
Daenerys could be in it. She has a strong personality and is used to being in control. If someone challenges her or her claim to the Iron Throne in the fanfiction, it could lead to a catfight. Also, Margaery. She's clever and manipulative, and a catfight with her could be very interesting as she tries to outwit her opponents using her charm and wits.
Theon Greyjoy is also a candidate. His identity and self - worth are often tied to his appearance. A headshave in fanfiction could be a way to explore his further degradation or, conversely, his redemption as he sheds his old self - image and tries to start anew.
Daenerys could be a likely character. She has a strong will, and seeing her being hypnotized or using hypnosis on others would be an interesting twist. It could play into her power dynamics, like hypnotizing her dragons to perform different tasks.
Well, the Gold King is obviously one of the main characters. There might also be his advisers, like an old and wise man who has been with him since his early days. His enemies are also important characters, perhaps a rival king or a powerful sorcerer who wants to dethrone him.
There might be descendants of the main characters from 'Game of Thrones'. For example, the children or grandchildren of Jon Snow, Daenerys Targaryen etc. could be central characters.
Daenerys, Jon Snow, and Cersei are very likely to be main characters as they have been central to the story so far.
Arya Stark would also be a good choice. Her assassin skills could be put to use in a modern - day context. Maybe she'd be hunting down criminals instead of her enemies in Westeros. And her independent spirit would make her an interesting character to follow as she adapts to the real world.