One possible example could be a fanfic in which a Final Fantasy summoner character summons a creature from the 'Harry Potter' world. And through this encounter, they start to interact more and more, and a relationship forms between them. Or perhaps a story where the Death Eaters in 'Harry Potter' somehow get involved in a conflict in the 'Final Fantasy' universe, and a hero from 'Final Fantasy' has to team up with a 'Harry Potter' character to stop them. These are just some rough ideas of what could be in this type of fanfiction.
There could be a fanfiction where Ron Weasley is transported to a Final Fantasy world and meets a character with whom he has to work closely. As they face challenges together, they start to understand each other on a deeper level. Another example might be a story that focuses on a love triangle between a Harry Potter character, a Final Fantasy character, and another character from either franchise. The possibilities are really endless as long as the writer is creative enough to blend the two very different universes.
I'm sorry I can't directly give specific examples as there are so many out there and it's hard to pinpoint just a few. But generally, it could be a story where Hermione Granger and a Final Fantasy mage - like character go on an adventure together. Or Harry Potter might end up in a world similar to a Final Fantasy setting and befriend a character from there, and their relationship develops in a way that is the focus of the'slash' aspect.
One example could be a fanfiction where there are nested storylines about the relationship between Harry and Draco, but with a unique twist on their relationship that goes beyond friendship or rivalry (the slash aspect). Another might be a story that has a main plot about the Hogwarts students, but then within that, there are smaller sub - plots about different character pairings like Hermione and Luna (a slash pairing).
One example could be a story where Harry and Draco form an unlikely friendship that turns into a romantic relationship while also involving other characters like Hermione and Ron in sub - plots that help or hinder their relationship. Another might be a story with a multi - character focus where Sirius and Remus have a relationship and they all deal with the ongoing battle against Voldemort in new and different ways compared to the books.
There could be a fanfic where Harry Potter himself is transported to the Star Wars universe and teams up with Luke Skywalker. They combine their skills, Harry with his magic and Luke with his lightsaber and Jedi powers, to defeat a common enemy. Also, a story where the Millennium Falcon crew visits Hogwarts could be an interesting example of this type of fanfiction.
One example could be a story where Harry and Voldemort have a rap battle instead of a final magical duel. Harry's raps could be about hope and friendship, while Voldemort's would be full of dark and menacing lyrics.
This 'harry potter final fantasy slash fanfiction' is likely a very creative and niche form of fan writing. Fans who are passionate about both 'Harry Potter' and 'Final Fantasy' are probably using their imaginations to bridge the gap between the two. The'slash' aspect may lead to some interesting character dynamics. Maybe a Harry Potter character teams up with a Final Fantasy character on a quest, and during that time, a deeper bond forms between them that is not just friendship but something more, like a romantic or a very close platonic bond. And this fanfiction allows fans to explore these unique combinations and relationships that would never exist in the original works.
One example could be a story where the characters from Harry Potter find themselves in the world of Final Fantasy 8. Maybe Harry uses his magic in the same way Squall uses his gunblade, creating unique battle scenarios. Another could be a crossover where the spells in Harry Potter are combined with the junction system of Final Fantasy 8, leading to some really interesting power - ups for the characters.
I'm not sure specifically which 'Harry Potter betrayed' slash fanfictions exist. But in general, a 'betrayed' theme might involve a character like Harry being betrayed by a close friend, perhaps Ron or Hermione in some dark, alternate storyline created by the fanfic writer. It could explore themes of broken trust and how Harry copes with such a betrayal.
Some fanfictions that are overly long - winded and full of filler content can be considered the worst. They might have pages and pages of a character just thinking about nothing important or going through mundane daily activities that have no real connection to the main plot of the Harry Potter world.
One example could be a fanfic where Harry has the ability to control time without any limits, which is much more powerful than the time - turning devices in the original series. Another might be a story where Voldemort is made invincible and can defeat any opponent with a single spell, completely overpowering the other characters.
One example could be 'The Dominant Potter' where Harry discovers a new and extremely powerful form of magic early on and uses it to take charge in the fight against Voldemort. He is shown as being dominant in strategic planning and combat situations.