There could be Hermione and Ron. Since they are Harry's best friends in the original series, they would likely be important characters in this fanfiction too. They might be curious about Ducky and his relationship with Harry, and could even get involved in some of the adventures that are related to Ducky's past or his influence on Harry.
Well, it could influence the plot in many ways. Maybe Ducky, being Harry's uncle, has some unique magical knowledge or abilities that he passes on to Harry. This could help Harry in his battles against Voldemort. For example, Ducky might know some ancient spells that are not taught at Hogwarts, and these spells could give Harry an edge in dangerous situations.
Yes, in some fanfictions, there could be a creative plot where Harry Potter is made to be Jethro's nephew. Fanfiction often takes the liberty of creating such unexpected family relationships to explore new storylines and character dynamics.
In most traditional 'Harry Potter' lore, there is no relation to a character named Jethro. However, in fanfiction, the author has the creative license to create any sort of relationship. So it could be possible in a particular piece of fanfiction that Harry Potter is made out to be Jethro's nephew, but this is not part of the official 'Harry Potter' universe.
Since this is a fanfiction, the identity of Jethro's nephew could be completely up to the writer. He could be an ordinary Muggle who has some special connection to the wizarding world through Jethro. Or he could be a character with some hidden magical abilities that even he doesn't know about until Harry Potter discovers him.
Yes, there might be. The 'Harry Potter' and 'NCIS' (where Gibbs is from) fandoms are quite large, and it's not uncommon for fans to create crossover fanfictions. You can try searching on popular fanfiction websites like Archive of Our Own or Fanfiction.net.
It's possible that there is a fanfiction with this premise. The world of fanfiction is vast and diverse. Writers often like to blend different fictional universes to create something new and exciting. To find out if this exists, you could start by looking at popular fanfiction websites. Check the relevant sections for both 'Harry Potter' and 'Supernatural' - related fanfictions. You could also try using specific search terms related to this concept on search engines dedicated to fanfiction.
One possible implication is a change in family dynamics. Harry would have a new family connection that could influence his decisions and actions. For example, he might be more hesitant to engage in dangerous wizarding activities if he knew Jethro was watching out for him.
Another aspect could be the family dynamic. Since Tony is known for his brash and confident personality, he might be overprotective of Harry as his nephew. Harry, on the other hand, is used to dealing with the wizarding world's challenges on his own. This could lead to some interesting conflicts and growth for both characters. For instance, Tony might try to keep Harry away from Hogwarts, thinking it's too dangerous, but Harry would be determined to go and learn magic.
There might be. Fanfiction is a vast world where authors can play around with different ideas. This particular concept of Harry being Snape's nephew could add a whole new layer of complexity to the story. For example, it could change the dynamic between Snape and Dumbledore, as Snape might be more protective of Harry due to their family connection. It also has the potential to rewrite many of the emotional moments in the original series.