Avoid the 'instantly redeemed' trope. A Sith turning good overnight without proper development is unrealistic. Also, don't use the 'chosen one' trope too much. Just because they're a good guy Sith doesn't mean they have to be the only one who can save the galaxy. Another trope to avoid is the 'evil for the sake of evil' in the other Sith characters. Make their motives more complex.
One trope to avoid is the 'love at first sight' between a good guy Sith and another character, especially if it's used as the sole reason for character development. It's often cheesy. Also, stay away from the 'unbeatable hero' trope. Your good guy Sith should face real challenges and losses. And don't overdo the 'mysterious past' trope. While it's important to have a backstory, it shouldn't be so convoluted that it confuses the reader.
In good guy Sith OC fanfiction, avoid the 'one - dimensional villain' trope for the antagonists. Just because the main character is a good guy Sith doesn't mean the bad guys have to be completely evil without any redeeming qualities. Also, don't rely too much on the 'deus ex machina' trope. Solutions to problems should come from the character's growth and actions, not some random outside force. And avoid the 'token sidekick' trope. Side characters should have their own personalities and motives.
First, develop a unique Sith character. Give them motives that are not entirely evil, like a Sith who wants to reform the Sith Order from within. Then, focus on the character's backstory. Maybe they had a rough childhood that led them to the Sith but also instilled some good values. Next, create interesting relationships. They could have a friendship with a Jedi who challenges their beliefs. Also, use vivid descriptions of the Star Wars universe, like the dark, brooding Sith temples or the bustling Jedi academies.
One common trope is the OC being a new student or outsider in the fanfiction world. For example, in a Harry Potter fanfic, an OC might be a transfer student to Hogwarts. Another is the OC having a special power or ability that sets them apart. They could be the only one who can communicate with a certain magical creature. Also, the OC might become a love interest for a canon character, like an OC falling in love with Sherlock Holmes in a Sherlock fanfiction.
Some common tropes in villain oc fanfiction include the 'seductive villain' trope. This is when the villain uses their charm or attractiveness to manipulate others. It can add an interesting dynamic to the story. The 'vengeful villain' trope is also quite common. They are seeking revenge for some past wrong done to them. And then there's the 'evil legacy' trope. The villain oc is following in the footsteps of an even greater evil from the past, and they are trying to live up to that reputation or complete some unfinished evil business.
One great 'oc sith fanfiction' story could be about an OC (original character) Sith who struggles to rise through the ranks in the Sith hierarchy. This character might face challenges from other Sith Lords who see them as a threat. Another interesting one could be an OC Sith's journey to discover an ancient Sith artifact and the battles they have to fight along the way.
Power struggle is a very common theme. The OC often has to deal with the power - hungry Sith and find their place in the hierarchy. Another theme is redemption. Sometimes the OC tries to bring some good to the Sith or find a way to break free from the dark side.
Power is a very common theme. Many Sith OC fanfictions focus on the character's pursuit of power, whether it's over the galaxy or just within the Sith order. Another theme is redemption. Some stories explore whether a Sith OC can turn away from the dark side. And of course, the struggle between the light and the dark side is always a popular one.
One common trope is the makeover. The popular guy might help the unpopular girl change her appearance, which then leads to a newfound confidence in her. Another is the 'opposites attract' situation where their different social statuses in school create interesting dynamics. For example, they might get paired up for a school project and slowly start to fall for each other despite their initial differences.
One common trope is the 'forbidden love' between the OC and Dracula. The OC, whether human or vampire, finds themselves drawn to Dracula's dark allure despite the danger. Another is the 'newbie in the vampire world' trope, where the OC is a newly turned vampire trying to navigate the rules and power dynamics in Dracula's domain.
One common trope is the 'lost kid' trope. The Kid OC is lost in Gotham and Batman takes them under his wing. Another is the 'unexpected help' trope, where the Kid OC has a special ability that helps Batman solve a case he was struggling with. And the 'innocent perspective' trope, where the Kid OC sees the dark world of Gotham in a different, more innocent way than Batman.
In Kingdom Hearts OC fanfiction, a popular trope is the 'Mysterious Past'. The OC has a past that is slowly uncovered throughout the story, often involving a connection to a great evil or a long - lost prophecy. The 'Forbidden Love' trope also appears sometimes, where the OC falls in love with a character that they shouldn't, perhaps a Heartless or a character from an opposing side. Additionally, the 'Chosen One' trope is common, with the OC being the only one who can save the Kingdom Hearts universe from a new and greater threat.