Obviously, Harry Potter himself would be a main character. Elrond, who is raising Harry, would also be a central figure. There might also be other elves like Arwen, Elrond's daughter, who could play important roles. Maybe some of Harry's friends from Hogwarts could make appearances in the story, even if it's just in his memories.
One interesting plotline could be Harry learning elven magic. Since Elrond is an elf, he would have different knowledge of magic compared to what Harry is used to in the wizarding world. Another could be Harry's interactions with other elven characters. He might form unique friendships or rivalries. Also, his growth in a completely different cultural setting than Hogwarts would be fascinating.
One common theme could be forbidden love. Since Elrond is a significant figure, a 'lemon' fanfic might explore a relationship that is not allowed in the traditional lore. Another theme could be passion and desire, which are often associated with the 'lemon' aspect.
I'm not entirely sure as I haven't read this specific fanfic. But generally, if it's 'Harry raised by Gai', it might be a story where a character named Gai takes on the role of raising Harry in an alternate universe or fan - created scenario.
Another theme is their roles in the events of Middle - earth. Fanfics might focus on how they work together to face challenges such as the threat of Sauron. They could be depicted strategizing together or relying on each other's strengths in battle or diplomatic situations. This shows their importance in the overall struggle against evil in Middle - earth.
He might be more old - fashioned in his ways. His grandparents' values would likely have a big influence on him, so he could be more reserved and traditional compared to the Harry we know from the original series.
Well, it could be that Harry is raised in a world where cologne has some sort of magical property. Maybe the scent of a particular cologne is used to protect him or give him special powers. For example, the cologne might be made from rare magical ingredients and whenever Harry wears it, he can blend into the Muggle world more easily because it masks his wizardly aura.
Well, perhaps in this fanfic, Iskandr takes Harry in at a young age after some kind of incident in the wizarding world. Iskandr could raise Harry in a place far from Hogwarts, exposing him to different cultures and magics. As Harry grows, he starts to combine the knowledge he gets from Iskandr with his own natural talent, and they might even go on adventures together to fight against dark forces that are a threat not only to the wizarding world but also to the broader world that Iskandr is aware of.
Protection is also a big theme. James is determined to protect Harry from the various threats in the wizarding world. And there's the theme of redemption in some fics. Maybe James has made some mistakes in his past, and raising Harry becomes a way for him to redeem himself and make a better future for his son.
Well, in 'Harry Raised by Goblins Fanfic', a frequent theme is the idea of alternative upbringing. It shows how a different environment can shape Harry's character. Also, power dynamics is a common theme. Since goblins have their own views on magic and power, it often leads to interesting situations when Harry is involved in the wizarding world's power struggles. There's also the theme of loyalty. Harry has to decide who he is loyal to - the goblins who raised him or the wizarding world he is also a part of.