Well, consider Darth Sidious. He was pulling the strings from the shadows. He had the clone army created with a hidden order to turn on the Jedi. His puppet, Darth Tyranus, was out in the open leading the Separatist forces. This caused the Republic to mobilize their clone army against the Separatists. Darth Maul also had an influence. His presence and his thirst for revenge led to battles and skirmishes that were not originally part of the main conflict. All these Sith Lords together made the Clone Wars a much more complex and deadly affair.
One way to create an OC Sith in Star Wars Clone Wars fanfiction is to first decide on their backstory. Maybe they were once a Jedi who was seduced by the dark side. Their appearance could be menacing, with dark robes and a red lightsaber. For example, they could have been a Jedi who was frustrated with the Jedi Council's decisions and turned to the Sith for power.
One great Star Wars: The Clone Wars OC Sith fanfiction is 'The Dark Apprentice'. It follows an original Sith character who has a unique backstory. The author does a great job of integrating this OC into the existing Clone Wars universe, showing how they interact with well - known characters like Anakin and Obi - Wan. The story is full of action - packed lightsaber battles and political intrigue.
A possible fanfiction could focus on a group of clones who discover a hidden Sith Empire base during the Clone Wars. They have to fight against the Sith's dark powers and their own programming as they try to warn the Republic. This could involve intense battles and moral dilemmas for the clones.
The main difference is their origin. Clone Troopers were cloned from Jango Fett, so they had a genetic basis for their skills. Storm Troopers were recruited from various sources. In fanfic, this can lead to differences in how they are portrayed in combat, with Clone Troopers having more in - built combat instincts.
Earth would likely have a mixed reaction. The scientific community would be fascinated by the Clone Troopers' genetic makeup and advanced weaponry. Civilians might be scared, thinking it's an alien invasion. However, some groups, like military enthusiasts, could see them as allies and want to cooperate. There would also be a lot of speculation about their purpose and where they came from. If the Clone Troopers came in peace, there could be a slow process of integration and cultural exchange.
Clone Troopers would probably win. They were bred for combat, had better training initially, and a higher level of genetic customization which could give them an edge in combat compared to Storm Troopers, who are often depicted as less accurate and more bumbling in the movies.
Power is a very common theme. The Sith are always seeking more power, whether it's through political manipulation during the Clone Wars or by obtaining ancient Sith artifacts. Another common theme is revenge. Many Sith characters in fanfiction are out for revenge against the Jedi or other enemies. Deception is also prevalent as the Sith are masters of it, using lies and false appearances to further their goals in the Clone Wars setting.
A possible story idea could be that your OC Sith discovers an ancient Sith prophecy. They believe it will lead them to ultimate power. So, they start a quest to find the artifacts related to this prophecy during the Clone Wars. This could involve them infiltrating Jedi strongholds and causing chaos.