A young and idealistic knight from a minor house. He travels back in time and gets caught up in the events of the Dance of the Dragons. He could side with different factions based on his sense of honor and justice, and his actions could potentially change the outcome of that bloody civil war.
A female assassin from Essos. She is sent back in time on a mission by a powerful warlock. In the past, she could use her skills to either protect or target key characters in Westeros' history, like trying to assassinate Tywin Lannister when he was young to change the future of the Lannister family.
First, you need to create a well - rounded male original character (OC). Consider his backstory, like where he's from, his family, and any past traumas or achievements. For example, if he's from the North, his values might be different from someone from King's Landing. Then, think about how he fits into the existing 'Game of Thrones' world. Is he a knight? A maester? A commoner with a hidden talent? You also have to give him a goal or a motivation. It could be something as simple as survival in the brutal world of Westeros or a grand ambition like sitting on the Iron Throne. When writing the fanfic, stay true to the tone of the original series. Use the same level of political intrigue, violence, and complex relationships that made 'Game of Thrones' so popular.
One idea could be an original character traveling back to the time of Aegon's Conquest. They could try to change the course of history by preventing certain alliances from forming. For example, they might stop the Starks from allying with the Targaryens, which would have huge ramifications for the future of Westeros.
Perhaps the main character could be a female machinist. In a world dominated by men, she has to fight against prejudice while also using her skills. She could be from one of the noble houses but has a secret love for machinery. She might be working on a project to build a flying machine, which is seen as crazy by others, but she is determined to prove them wrong and change the face of warfare in Westeros.
A lost princess from Westeros who washes ashore in Ulthos. She quickly realizes that Ulthos is a land full of secrets and danger. With her charm and the political knowledge she learned in Westeros, she tries to navigate the complex power structures in Ulthos and make a name for herself.
A demon who has taken on human form could be the main character. He could be disguised as a knight or a noble, secretly using his demonic powers to influence the events in the Seven Kingdoms.
An OC who is a skilled assassin would be a good choice. They are hired to kill someone in King's Landing but cross paths with Cersei. Cersei, instead of having the OC killed, decides to use their skills for her own purposes. The assassin has their own code and ethics, which would constantly be at odds with Cersei's methods.
Arya Stark could be a great main character. With her skills and determination, in the ROS Daisy context, she could gain some new powers or abilities. Maybe she discovers a Daisy - related magic that enhances her already formidable skills in stealth and combat. This would make her even more of a force to be reckoned with in Westeros.
Arya Stark would be an excellent choice. She has already had a great character arc in the original series. In a fanfic, she could use her skills as a Faceless Man to infiltrate different courts and kingdoms, working towards a greater good. Maybe she's trying to prevent a new war from breaking out or uncovering a dark conspiracy that threatens all of Westeros.
A young girl from a small village near the Wall could be a great main character. She could be an orphan who has a special connection with nature. One day, she finds a dragon egg while exploring a cave. She has no idea what it is at first, but she feels drawn to it. As she takes care of the egg, she starts to develop powers of her own that are related to the dragon's magic. Eventually, she hatches the dragon and becomes a powerful figure in the North.
A Stark could be a great main character. They are known for their honor and loyalty. A Stark warden would have to deal with the aftermath of the War of the Five Kings and try to rebuild the North. He or she would face challenges like dealing with the Boltons, who had previously held power through treachery. Another option could be a Tyrell. The Tyrells are a powerful family and a Tyrell warden would be involved in the complex politics of the Reach, like dealing with the High Sparrow's influence.