Yes. In the Harry Potter fandom, the concept of Harry being a Horcrux is quite a popular and fascinating one for fanfic writers. It adds a whole new layer of complexity to the story and character relationships.
In a 'harry potter and the last horcrux fanfic', it may center around the significance of the last Horcrux. It could depict the emotional and mental state of Harry as he approaches the end of his long journey. There could be unexpected twists, like the Horcrux being hidden in a place no one suspected. It might also expand on the lore of Horcruxes, for example, by showing different ways to detect or destroy them that were not mentioned in the original series.
Well, identity exploration is a big one. Harry has to figure out what it means to be a Horcrux on top of being the Boy Who Lived. There is also the theme of moral conflict. He is part of Voldemort's dark creation, yet he is the symbol of hope. How does he balance this? Another common theme is the exploration of magic. Since he is a Horcrux, there could be new and different magical aspects to his being that fanfic writers can explore, like how his Horcrux - ness affects his magical abilities or his connection to other magical objects.
One consequence could be that his connection to Voldemort becomes even stronger. This might lead to him being able to sense Voldemort's actions and thoughts more clearly, but also make him more vulnerable to Voldemort's attacks on his mind. Since the Horcrux is a part of Voldemort's soul, it could also start to influence Harry's personality, making him more aggressive or moody at times.
Harry Potter would surely be one of the main characters. Since it's about the last Horcrux, he's the one on the mission to destroy it. His friends, like Hermione and Ron, would likely also be main characters as they usually accompany Harry on his adventures.
A really creative concept in some 'Harry Potter Horcrux fanfic' is the idea of a Horcrux being able to change form. So instead of always being a physical object like a locket or a diary, it can transform into a living being or an intangible force. This adds a whole new layer of complexity to the hunt for Horcruxes and how to destroy them. In some fanfics, this transformation ability is related to the emotions or the intentions of the person who created the Horcrux.
Well, perhaps in the fanfic, Harry discovers a new form of magic that he misinterprets as a way to gain an edge over Voldemort. He thinks that by making a Horcrux, he can store part of his soul safely away so that if Voldemort tries to kill him, he can come back. He chooses his wand as the Horcrux object. But as he does it, he starts to feel the darkness seeping into him and realizes he has made a terrible mistake.
Yes, in some fanfiction, Harry Potter is considered a Horcrux. This concept adds an interesting twist to the original story, exploring different aspects of magic and the connection between Harry and Voldemort.
If Harry were to create a Horcrux in fanfiction, it would likely lead to a great corruption of his soul. Horcruxes are dark magic, and the act goes against all that Harry stands for in the original series. He might start to show signs of increased aggression, a detachment from his friends, and a growing attraction to the Dark Arts.
One great 'Harry Potter Horcrux fanfic' is 'The Horcrux Hunt'. It has an exciting plot where the characters go on a dangerous journey to find all the Horcruxes in a different sequence than in the original books. Another one is 'Horcrux Revelations' which delves deep into the nature of Horcruxes and how they could have been created and destroyed in alternative ways.