Wolverine could be a lone wolf (no pun intended) in the fanfiction. He roams the lands of Westeros, helping those in need on a more individual basis. He could encounter Arya Stark and teach her some new combat techniques, using his knowledge from his own world. He could also have run - ins with the Lannisters, especially Jaime, and their different views on honor and combat could lead to some interesting confrontations.
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.
Rome could play the role of a mysterious foreign power. It might send envoys to the Seven Kingdoms to form alliances or gather information. This would add an extra layer of diplomatic intrigue to the story.
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.
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.
In a Game of Thrones fanfic, Hermione could be a mediator. There are so many conflicts in Westeros, from the Stark - Lannister feud to the battles for the Iron Throne. Hermione, with her logical mind and ability to see different perspectives, could step in and try to broker peace deals. She would use her communication skills, honed in the wizarding world, to get the warring parties to at least listen to each other and consider alternatives to all - out war.
Smaug could be a terrifying and powerful antagonist. He could be lured to Westeros by the smell of gold and riches in the various kingdoms. His ability to fly and breathe fire would make him a formidable foe against any army or dragonriders in the Game of Thrones universe.
He could be a rebel. Tired of the Bolton family's traditional ways, he might try to change the family's reputation. He could be a force for good in the North, protecting the smallfolk from the usual Bolton brutality.
Well, Wolverine could be brought into the Game of Thrones universe through some sort of magical portal. Once there, his sense of honor and his own code of conduct could put him at odds with some of the more devious characters in Westeros. He might find himself allied with the Night's Watch, using his abilities to fight against the White Walkers. His adamantium claws could be the key to defeating some of the more powerful undead creatures.
In a Game of Thrones fanfic, Frederick the Great could be a foreign invader. He'd come from across the sea with his well - trained armies. His arrival would disrupt the status quo. The existing lords and ladies would have to decide whether to fight him or ally with him. His goals could range from conquest to simply finding a new place to establish his own kingdom, and his actions would have a huge impact on the story.