The concept is fascinating as it allows for a different exploration of the wizarding world. Harry as an Obscurus can change the power dynamics. For example, he may have abilities that are not fully understood by the Ministry or even Dumbledore. This can lead to new plotlines like him being hunted or having to prove that he can control this power for the good of the wizarding world. It also gives a chance to explore the darker side of magic that was not as deeply delved into in the original series.
Well, 'Harry Potter is an obscurus fanfiction' is a rather odd statement. In the official Harry Potter lore, Harry is a wizard with his own story arc. An 'obscurus' is a dark and dangerous form of magic that results from magic being repressed. If it's called fanfiction, it might imply that someone has created a very unorthodox and perhaps not - in - line - with - the - original - books story where Harry is somehow related to an obscurus in a way that's not part of the original J.K. Rowling's vision.
I'm not sure specifically as there could be many different takes in such a fanfiction. It might explore Harry's journey if he was an Obscurus, perhaps dealing with the dark and uncontrollable magic within him and how it affects his relationships and his role in the wizarding world.
The main character is Harry, of course. But in addition to Ron and Hermione, other characters could be significant. For example, Voldemort or his followers might sense Harry's new power and become interested in using it for their own evil purposes. So they could be antagonists in the fanfic. Also, some new characters might be introduced, perhaps a wizard or witch who has some special knowledge about the Obscurus and tries to guide Harry on his journey, either for good or bad motives.
Well, 'Harry's Obscurus Secret' is a great fanfiction. In this story, Harry discovers his Obscurus nature early on and has to figure out how to control it without the help of Dumbledore at first. It shows his struggle and growth as he tries to keep this huge secret from his friends. There's also a fanfic called 'The Obscurus Within Harry' that delves into the origin of his Obscurus state and how it relates to his parents' past.
There could be a fanfiction where an obscurus is unleashed in Hogwarts and Harry Potter has to use his unique skills and knowledge to deal with it. He might have to team up with his friends, Hermione and Ron, to figure out a way to stop the chaos it's causing. This type of fanfiction would likely involve a lot of action and mystery as they try to understand the nature of the obscurus while also protecting the school.
One interesting 'obscurus harry potter fanfic' could be about Harry learning to control an obscurus within him in a way that the original books didn't explore. Maybe he discovers ancient magic that helps him tame it and use it for good, like protecting Hogwarts from a new dark threat.
In some versions of 'harry becomes an obscurus fanfic', the key plot could be Harry's journey to master the Obscurus power. He might start out as an outcast because of it, but then discovers that it can be a weapon against the real threats in the wizarding world. His relationship with Dumbledore or other authority figures might change as they try to help or restrain him. And there could be a big showdown where he has to decide whether to fully embrace or reject the Obscurus within.
You can try fanfiction websites such as Archive of Our Own (AO3) or FanFiction.net. Just search for the title or relevant keywords like 'Harry Potter', 'Harry', 'Obscurus' on those platforms.
There might be a fanfiction where the concept of obscurus is used in a different magical school setting within the Harry Potter universe. In this story, Harry Potter visits the school to deal with a student who has an obscurus and in the process, learns more about the different magical cultures. The story could explore how different magical traditions handle such a dangerous and complex magical phenomenon.