No. The Harry Potter series has its own official and complex lore. While fanfiction can explore different ideas, calling Harry Potter 'a obscurial fanfiction' goes against the established canon of the books and movies.
The main wrong with it is that it oversimplifies the Harry Potter series. Harry Potter is a multi - faceted story with many elements like magic education, a complex wizarding society, and a long - standing battle against evil. An Obscurial is just a small part of the overall magic system, not the whole basis for the story.
Credence Barebone is often a central character in fanfictions that involve Obscurials. Since he was the main Obscurial introduced in the movies, many fanfictions expand on his story, giving him more power and a more complex backstory. Another popular character is an original Obscurial created by the fanfiction author. This character might be a student at Hogwarts who has been hiding their Obscurial nature, and their discovery and journey of self - acceptance becomes the focus of the story.
Some fanfictions focus on the training of an Obscurial. They might show how a skilled wizard or witch tries to teach an Obscurial to master their powers without suppressing them completely. This often involves a lot of emotional and mental training as well, as the Obscurial's power is closely tied to their emotions. It can make for a really interesting character arc within the fanfiction.
One interesting aspect could be the exploration of the Obscurial concept in a fan - created context. It might show different interpretations of how an Obscurial's power and nature could be developed further than in the original series.
One idea could be exploring the backstory of an Obscurial who was hidden within Hogwarts all along. Maybe they were a Muggle - born who was constantly bullied and their magic turned into an Obscurial out of fear and repression.
Well, one possible plot development could be that Harry has to hide his new status as an Obscurial from his friends at Hogwarts for fear of being ostracized or worse. Another could be that Voldemort somehow discovers Harry's new condition and tries to use it to his advantage, perhaps by trying to manipulate the Obscurial power within Harry. Maybe Harry has to learn to control this new, dangerous power on his own as he can't trust Dumbledore or the other teachers with this secret at first.
In some cases, it could be other dark wizards or witches who are envious of Harry's new power. They might want to steal his Obscurial power for themselves or use it to gain dominance in the dark wizarding underworld. These antagonists might be minor characters in the original series but could be developed more in the fanfiction to create new and interesting conflicts for Harry.
If Harry Potter becomes an obscurial in fanfiction, the story could take a very different turn. He might not be as eager to attend Hogwarts as he was originally. The Dursleys might have an even worse time with him because his obscurial powers could lash out. At Hogwarts, teachers would be extremely concerned. Snape, for instance, might be even more critical of him, seeing him as a potential danger. And Harry would have to learn to control this new and dangerous aspect of himself.
The main difference is the focus on the Obscurial. In the original stories, the Obscurial was a minor part, but in the fanfiction, it's a central element that Harry has to deal with.