In fanfiction, Aragorn could potentially be a king from a far - off land who arrives in Westeros. He might bring with him a different style of leadership and a sense of honor that is somewhat different from the lords and ladies of Westeros. He could get caught up in the power struggles, especially if he realizes the threat of the Iron Throne being misused. Maybe he would try to form alliances with the more noble houses to bring stability to the land.
Aragorn in a Game of Thrones fanfiction could be a mysterious figure. Given his elvish heritage in his original story, he might have some sort of connection to the Children of the Forest in the Game of Thrones universe. His presence could disrupt the existing balance of power. He could start off as a lone traveler, but as his story unfolds, he might gather a following of those who believe in his cause, whether it's to fight for justice or to protect the realm from the various threats that loom over Westeros.
Well, Aragorn is from a very different fictional universe than Game of Thrones. But if in a fanfic, he might bring his elvish connections which could be a huge advantage in the power - hungry world of Westeros. He could form alliances with the more honorable houses like the Tullys perhaps, based on his own code of ethics. And his experience in battles against great evils would give him an edge in the many wars that plague Westeros.
The Hulk might be seen as a sort of monster in the context of Game of Thrones. Just like how they have direwolves and dragons, the Hulk could be another mythical - but in this case, suddenly very real - creature. He could be shunned by some and perhaps worshipped as a god by others, depending on how different regions of Westeros react to his existence.
She could fit in as a spy. Given her ability to deceive and her immortality, she could gather information for different factions. For instance, she could work for the Starks initially, but then switch sides if she saw more benefit elsewhere.
They could be a new faction. Samurai have a strict code of honor, much like the knights in Westeros. They might be seen as a threat initially, but could also form alliances. For example, they could side with the Starks who also value honor. Their unique fighting styles would be a novelty in the battles of Westeros.
A house gardener could fit in as a keeper of secrets. The gardens often have hidden corners and old trees that could hide things. He might stumble upon a hidden cache of weapons or a secret meeting place. His presence is often overlooked as he is just a gardener, so he can observe a lot without being suspected.
Percy Jackson would be a very interesting addition to the Game of Thrones world. His ability to control water would be a huge asset in battles. For instance, he could create floods to stop enemy armies or use water to put out dragon fire. In the political arena, he might be seen as a threat by some because of his powers, but also as a potential ally by others who want to use his abilities for their own gain.
Kakashi could fit in as a foreign warrior. He could bring his ninja techniques which would seem like magic to the people of Westeros. His stealth and combat skills would make him a valuable asset or a feared opponent in the battles and power plays of the Seven Kingdoms.
Smaug could potentially be a part of the magical elements in the 'Game of Thrones' fanfiction. He could be connected to the old magic that once existed in Westeros. Maybe his presence awakens other dormant magical forces. His actions could also influence the political landscape. For example, if he attacks a certain region, the lords there would have to divert their resources from the power struggles to deal with the dragon threat, which in turn could give an advantage to other houses.
Legolas could be an outcast in the Game of Thrones world at first. But as he gets to know the people and their struggles, he decides to get involved. He could start a new movement, based on elven values like harmony with nature and loyalty. His actions could inspire characters like Jon Snow to think differently about leadership and ruling, and together they could work towards a more just and sustainable Westeros.
Achilles would be an out - of - place yet fascinating addition to the Game of Thrones universe. Given his near - invincibility in battle, he could potentially change the balance of power. For example, if he fought for the Unsullied, they would become an even more terrifying military force. However, his sense of honor and heroism might clash with the more cut - throat politics of Westeros.