If Harry Potter becomes a Sith in fanfiction, it would be a wild departure from his original character. He'd likely trade his Gryffindor values for the dark and power - hungry ways of the Sith. His magic could take on a more menacing form, and his relationships would be severely strained. For example, his friendship with Ron and Hermione might turn into enmity as he delved deeper into the dark side.
Well, if Harry Potter becomes a Sith Lord in fanfiction, it would be a total upheaval of his character. The Sith are all about power, domination, and the dark side of the Force. Harry, who was raised with love and values like friendship and loyalty, would have to completely abandon those. He'd probably start wearing Sith robes and have a red lightsaber. His spells would take on a more sinister edge, and Hogwarts would be in for a lot of trouble as he tries to assert his newfound Sith - like authority.
Well, if Harry Potter becomes a Sith, he would likely be a very powerful one. He already has strong magical abilities, and adding the dark side powers of the Sith would make him extremely formidable. Maybe he could use the Force to enhance his spells, or create new and terrifying dark magic. He might also have a new look, with a Sith robe and a red lightsaber.
If Harry Potter becomes a Sith in fanfiction, his story would take a very different turn. For starters, his character arc would be flipped. He'd start from a relatively good - natured boy to a power - hungry and ruthless individual. His interactions with other characters would be full of conflict. His former friends would likely try to stop him, leading to intense showdowns. He'd also be more likely to align himself with the darker forces in the wizarding world, such as Death Eaters, and together they could wreak havoc. Moreover, his learning would no longer be about light magic but about the darkest and most forbidden spells and arts.
The story would become much darker. Harry would no longer be the hero fighting for good. Instead, he'd be causing chaos and destruction. His friends would either try to save him or become his enemies.
I'm not entirely sure as it's a very specific and perhaps not a mainstream concept. But it might be a fan - created story where the Harry Potter universe is combined with elements of Sith (from Star Wars) and the idea of pureblood. It could be about a Harry Potter - like character who has Sith - like powers and is of pureblood heritage in this new, mashed - up fictional world.
One idea could be a story where a Sith Assassin somehow gets transported to the Harry Potter universe. Maybe they initially see it as a strange and weak world compared to their own, but then they discover the unique magic there. They could try to use their Sith powers to dominate, but find that the magic of Hogwarts and its defenders are not so easy to overcome.
One idea could be a crossover where a powerful Sith Sorcerer somehow finds his way into the Harry Potter universe. Maybe he's on a quest for a unique magical artifact that only exists in the wizarding world. He could start causing chaos, and the Hogwarts students have to figure out a way to stop him using both their magic and their knowledge of the wizarding world's secrets.
A common theme is the struggle between good and evil. Since Harry is usually the main character who gets involved with Sith - like elements, it shows his internal battle between his original good - natured self and the dark influence. For example, in many of these fanfics, he might struggle with using dark magic for what he believes are good reasons.
I don't think it's a popular type of fanfiction. While there are many creative crossovers in the fanfiction world, the idea of making Harry Potter a sith pureblood is a rather strange and complex combination. It requires a deep knowledge of both the Harry Potter and Star Wars universes, and not many fans may be interested in such a convoluted mash - up. So it's likely not very popular.