He could play the role of a master strategist. Thrawn's ability to analyze his opponents and predict their moves would make him a valuable asset to any side in the 'Game of Thrones' power struggles. He could be the one to turn the tides in battles and sieges.
In a Game of Thrones fanfiction, Hermione might play the role of a disruptor. She's not from that world and has different values. Her presence would disrupt the status quo. For instance, she would not tolerate the way women are often treated in Westeros. She'd speak up and fight for equality, which would put her at odds with many of the traditional lords. At the same time, her magical abilities would make her a force to be reckoned with, so she could start to change things whether the people in Westeros like it or not.
She could be a healer. With her knowledge of medical ninjutsu, she could save many lives in the war - torn Westeros. This would make her a valuable asset to any side she chooses to support.
He could be a heroic figure. For example, he could be like a knight - errant, traveling around Westeros and helping those in need. His swordsmanship, which is quite different from the traditional Westerosi style, would make him a unique combatant.
Wolverine might be a disruptor in the Game of Thrones world. He doesn't follow the same rules as the Westerosi. His presence could change the way battles are fought. For example, in a large - scale battle like the Battle of the Bastards, his individual combat skills could turn the tide. He could cut through enemy lines with his claws and inspire the troops he's fighting alongside. He might also be a voice of reason among the power - hungry lords, as he has his own sense of right and wrong that is different from the political games in Westeros.
Hulk could be a protector of the Wall. Instead of the Night's Watch, he stands guard against the White Walkers. His strength would be a great asset against the undead hordes. He might not understand the politics of the Seven Kingdoms, but he knows when something is a threat. And the sight of a giant green monster fighting off the White Walkers would be an amazing addition to the Game of Thrones lore. He could also form an unlikely friendship with some of the members of the Night's Watch, like Jon Snow, who would respect his power and his simple sense of right and wrong.
A professional army could act as a protector. For instance, they could safeguard a small town or a noble family from bandits or rival houses. They would be more reliable than a conscripted or mercenary force.
Hashirama might become a powerful ally or a feared enemy in the Game of Thrones fanfiction. If he aligns himself with a certain house, his powers would make that house very difficult to defeat. He could also be a lone wanderer, using his skills to help the common folk. For instance, he could use his wood - style jutsu to create shelters for the poor or to clear paths in the forest for travelers. He would be like a force of nature in the world of Westeros, disrupting the normal power dynamics.
One way could be to make him a powerful foreign invader. He could bring his strategic military mind to Westeros, leading a force that challenges the existing powers. His unique tactics and ability to read his enemies would shake up the political and military landscape of the Seven Kingdoms.
He could be a major villain. His ambition and power - hungry nature would fit right in. He might seek to rule over all the kingdoms in Westeros, using his dark magic to eliminate any who oppose him.
His role could be that of a disruptor. Sasuke has always been one to go against the norm. In a Game of Thrones setting, he would likely not follow the traditional rules of Westerosi society. He might be a lone wolf, working towards his own goals while everyone else is vying for the Iron Throne.