One of the most memorable OCs could be a female warrior. She defies the gender norms of the 'Game of Thrones' world and is able to hold her own in battles. Her strength and determination make her stand out.
One memorable badass male OC could be a warrior who was once a commoner but through sheer determination and combat skills, rises to become a feared fighter. He might have his own code of honor that sets him apart from the typical power - hungry characters in Westeros.
Daenerys Targaryen. She starts as a meek girl sold into marriage and rises to be a powerful queen with dragons. Her journey from being powerless to a force to be reckoned with is very memorable.
Tyrion Lannister for sure. His wit and intelligence despite being a dwarf in a world that often discriminates against him make him stand out. Also, Jon Snow with his noble nature and his journey of self - discovery. And Daenerys Targaryen, a strong and determined woman with her dragons.
Jon Snow is often very popular. His mysterious parentage and his sense of honor make him a great character to explore further in fanfiction. Writers can expand on his time beyond the Wall, or his relationships with other characters like Daenerys in new and interesting ways.
Arya Stark is an extremely memorable character. Her determination to avenge her family and her ability to adapt in the face of danger are remarkable. Cersei Lannister is also very memorable. Her complex personality, her love for her children, and her ruthless ambition make her a fascinating and hated character at the same time. Then there's Ned Stark. His unwavering sense of honor in a world lacking it makes him a character that leaves a strong impression.
Often, the strong and morally ambiguous OCs tend to be popular. They can be characters who are not afraid to break the rules and make bold moves in the world of Westeros. Maybe an OC who is a skilled fighter and strategist, and uses their harem to gain more power and influence.
There could be a self - taught inventor from a small village. This character invents a flying machine of sorts, which is unheard of in the 'Game of Thrones' world. His story of being an outcast in his village because of his strange ideas but then becoming someone important due to his invention makes him very memorable.
Jon Snow is always a memorable character in Battle of the Bastards fanfiction. His leadership and determination are often central to the stories. He is the one leading the fight against Ramsay Bolton, and his actions and decisions drive the plot forward. Another is Ramsay Bolton himself. His cruelty and cunning make him a very interesting character. In fanfiction, his devious plans and his attempts to outwit Jon are often explored in more detail.
Arya Stark is quite unforgettable. She starts as a young girl but transforms into a fierce assassin. Jaime Lannister is another. His character arc from the 'Kingslayer' to a more complex figure is really interesting. And don't forget The Hound. His rough exterior and his relationship with Arya make him stand out.
Daenerys Targaryen is one of the most memorable. She goes from a meek girl sold into marriage to a powerful queen with dragons. Jaime Lannister is also quite unforgettable. He starts as a seemingly cold - hearted knight but has a great character arc. Then there's Ned Stark. His sense of honor and the tragic end he meets make him a character that stays in the viewer's mind.