I'm not sure specifically as there could be many different 'harry the sith fanfic' stories. It might be a fan - created story that combines elements of Harry Potter (assuming Harry here refers to the character from that series) and the Sith from Star Wars. It could involve Harry somehow getting involved with Sith - like powers or the Sith culture in a fictional and creative way.
Another theme could be redemption. In many Ahsoka Sith fanfic, even if she dips into the dark side, there is often a path towards redemption. It shows that no matter how far one falls, there is always a chance to come back. This can be a very powerful and inspiring theme, as it gives hope to the characters and the readers alike. Also, the exploration of power is a theme. The Sith are known for their pursuit of power, and when Ahsoka gets involved with them, she may be tempted by the promise of greater power, which can lead to many different plot developments.
It's about the downfall or the 'bane' of the Sith. It might explore the weaknesses within the Sith order, like their over - reliance on the dark side of the Force which could lead to their own destruction in some way.
Well, it could be his backstory. Maybe in this fanfiction, Harry has a really tough life that leads him down the dark path of the Sith. For example, if he's constantly betrayed or faced with extreme hardships that make him lose faith in the good side, he might turn to the Sith ideology.
A sense of ambition is a must. Sith are all about power, so your self - insert should be hungry for it. Ruthlessness also works well. They should be willing to do whatever it takes to achieve their goals. And a bit of cunning, like being able to outwit their enemies in the Sith hierarchy.
Yes, he might be. In some fanfiction universes, the author could reimagine Harry as the first Sith. This could be a really interesting twist on the original character, creating a whole new story arc full of dark side powers and different moral challenges compared to the traditional Harry Potter story.
The Sith's use of the dark side of the Force makes them interesting. In RWBY fanfiction, it creates a contrast to the more 'light - side' or heroic nature of the RWBY characters. Their powers, like mind control and energy manipulation, are different from the usual abilities in RWBY.