In fanfiction, Harry and Kreacher could be seen exploring the different terrains of Westeros. Maybe they stumble upon the Iron Islands. Kreacher could be fascinated by the Ironborn way of life while Harry tries to find a way to use their naval power for some greater good. Or they could end up in King's Landing and face the political intrigue there.
They might interact with Jon Snow. Harry could see a kindred spirit in Jon, both being outsiders in some ways. Kreacher might be initially distrustful but would come around. With Daenerys, Harry could be in awe of her dragons, and Kreacher might be cautious. They would also have different reactions to Tyrion. Harry might see his intelligence, and Kreacher might be a bit wary of his Lannister name.
Well, in this fanfiction, perhaps Harry Potter could use his magic to outwit the political intrigues of Westeros. He might introduce new forms of magic that could change the power dynamics among the houses.
In a 'Harry Potter Lord in Westeros' fanfiction, the plot could center around Harry Potter becoming a lord in Westeros through some magical means. As a lord, he would have to deal with the typical issues like managing his lands, protecting his people, and forming alliances. However, his magic would give him an edge. He could use spells to improve the harvests, defend his castle from invaders more effectively, and even try to bridge the gap between the different houses by using his unique perspective from the wizarding world.
One common theme is redemption. Kreacher has done some not - so - nice things in the original series, and many fanfictions focus on him finding a way to redeem himself. For example, through helping Harry or the other good characters.
In this fanfiction, the plot might revolve around Harry's struggle to balance Kreacher's teachings with the values of the wider wizarding world. He could face discrimination from other wizards who are suspicious of his upbringing. Meanwhile, Voldemort might see Harry as an even greater threat because he's been raised by Kreacher. Kreacher, being protective, tries to shield Harry from the Dark Lord, but Harry realizes he has to take a stand. This could lead to a series of battles and adventures where Harry has to prove himself not just as a wizard, but as a person with his own set of beliefs.
Kreacher is a very traditional character. His influence on Harry could mean that Harry is more into the old magic. He might be taught spells and incantations that are not commonly known in modern wizarding society. Also, Kreacher's loyalty to the Black family could make Harry more protective of the remaining members of the family and their heritage.
One possible plot could be that the fem Harry Potter arrives in Westeros with her magical abilities. She might get involved in the power struggles between the different houses. For example, she could use her magic to help a particular house gain an advantage in a battle, perhaps by creating illusions to deceive the enemy. Her unique brand of magic, different from the magic known in Westeros, would both amaze and frighten the people there.
One idea for a fanfic is that a new character comes to the wizarding world and has a special piece of jewelry that Kreacher is immediately drawn to. This jewelry has some sort of connection to the house - elf magic. The story could follow how Kreacher and this new character interact, with the jewelry as a focal point. It could lead to Kreacher learning new things about his own kind and his place in the wizarding world, all because of this piece of jewelry.
It would be a unique take on the Harry Potter story. Kreacher is a complex character. He could raise Harry in a way that emphasizes self - sufficiency and loyalty to a fault. Harry might not be as eager to jump into the fight against Voldemort as in the original story. Instead, he could be more focused on protecting his own little world created by Kreacher. Also, his magic could develop in a more unorthodox way due to Kreacher's unorthodox teaching methods.
It could be really interesting. Kreacher, being a rather complex and initially prejudiced house - elf, would raise Harry in a very different way from the Dursleys. Harry might grow up with a deep knowledge of the Black family secrets and traditions. He could also be more in tune with the wizarding world's darker elements from a young age.