Podrick Payne is often overlooked. He has a lot of potential in a fanfiction. He could be revealed to have a hidden talent for strategy, having learned from all the great knights he has served. And Bronn, while not completely ignored, could be further explored. He could find himself in a situation where he has to choose between his love for gold and loyalty to a cause that he actually believes in, like helping the common people of King's Landing.
Well, Daenerys Targaryen is often a popular choice. Her dragons and her journey of reclaiming the Iron Throne can be easily adapted into crossovers. For example, if she were to cross into a world full of magic - users, how would she use her power? Also, Jaime Lannister is quite popular. His character arc from a seemingly villainous knight to a more complex figure can be explored in different settings. In a crossover with a historical setting, his knightly skills and code of honor (or lack thereof at times) would be very interesting to play with.
Daenerys Targaryen is often a popular choice. Since she had a strong connection with the Dothraki in the original series, fanfiction can explore more of her relationship with them. For example, stories could focus on her early days with the Dothraki and how she really won them over, beyond what was shown in the show.
Jon Snow is often a popular choice. His noble and brooding nature makes for interesting reactions in fanfiction. Fans like to imagine how he'd respond to various out - of - character situations.
Podrick Payne is quite underrated. In fanfiction, he could be developed into a great knight with his own story. He has shown loyalty and potential, and could be given more heroic deeds. Another is Shireen Baratheon. She could be a key figure in fanfiction, perhaps having survived and using her kindness and knowledge to bring about positive change in Westeros. And Dontos Hollard could also be interesting. He could be redeemed in fanfiction and play a crucial role in the political games of King's Landing.
The Mandalorian himself is quite popular. His cool armor, mysterious past, and bad - ass fighting skills make him an interesting addition to the Game of Thrones universe. He can interact with the different houses and factions in unique ways.
Bran Stark is a popular choice too. Since he has the power of the Three - Eyed Raven, time travel can be related to his abilities. Fanfictions might have him traveling through time to gain more knowledge or to influence events in a more direct way. Jaime Lannister also features often. His character arc can be completely transformed through time travel, for example, going back to redo his actions as the Kingslayer or forward to see if he can redeem himself in a new Westeros.
Hot Pie. He may seem like a minor character, but he has a lot of potential. A fanfiction could explore his life after leaving Arya. Maybe he becomes a famous baker in a large city, and through his bakery, he gets involved in the political intrigues of the city as people from all classes come to his establishment.
Hot Pie is an underrated character. He could be the focus in a fanfiction where his baking skills become more than just a side note. Maybe he bakes special treats that have magical or medicinal properties and gets caught up in the big political and power struggles because of it.
Gendry is quite an underrated character. He has the blood of a king in him, being Robert Baratheon's bastard. In fanfiction, he could be explored more in - depth. He could rise up and claim his birthright, or he could use his skills as a smith to create powerful weapons for different factions. Another is Ser Davos. He's a loyal and smart man, but often overlooked. Fanfiction could show him in more complex political situations, using his wits to navigate through the power plays in King's Landing.
One of the most popular assassin characters in Game of Thrones fanfiction is Arya Stark. In the original series, Arya has assassin - like training in Braavos. In fanfiction, her skills are often enhanced and she is sent on all kinds of secret and dangerous missions. Another could be Jaqen H'ghar. His mysterious nature and assassin skills make him a fascinating character to explore further in fanfiction. He can change his face, which adds an extra layer of intrigue to his character in fan - made stories.