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.
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 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.
A fanfic might explore Kreacher's relationship with jewelry in the context of his loyalty to the Black family. He could have been tasked with taking care of certain precious jewelry items over the years. The story could show how he values these items not just for their material worth but also for the family heritage they represent. For instance, a ring that was passed down through generations and how Kreacher ensures its safety during the chaos of the wizarding wars.
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.
Some characters in Westeros might be very suspicious of Harry. His strange clothes and the way he does magic would make them think he's some sort of dark sorcerer. Others, like the more open - minded ones, might be curious and want to learn from him. For example, Tyrion Lannister might see Harry as an interesting oddity and try to figure out how his magic works.
In fanfiction, 'Harry Potter changes Westeros' could be through his magic skills. For example, his spells like Wingardium Leviosa could be used to move heavy objects in Westeros, which might change the way battles are fought or construction is done. His knowledge of the magical world could also introduce new concepts to the people of Westeros.
The fem Harry Potter could also change the power balance. If she aligns herself with a particular house, that house would gain an edge. Her knowledge of magic could be used to uncover secrets in Westeros, like hidden passages in castles or ancient prophecies that were previously unknown. This new information would disrupt the existing plans of the different factions vying for the Iron Throne and other power positions.