There's also 'A Prince's Redemption'. This fanfic delves deep into the moral struggles of the OC prince. It shows his journey from a somewhat lost and conflicted character to one who finds his true purpose. The writing style is engaging and it stays true to the overall tone of Code Geass.
Another good one is 'The Prince Among Shadows'. It focuses on the OC prince's secret operations and his attempts to change the fate of the world in his own way. The author does a great job of creating suspense and making the reader eager to find out what the prince will do next.
Another interesting one is 'The Male OC and the Geass Revolution'. In this fanfiction, the male OC discovers his Geass power by accident and uses it to try and change the fate of the oppressed people in the Code Geass world. The story has a lot of emotional depth as it delves into the OC's internal conflicts, his relationships with other characters, and his moral dilemmas.
There's a fanfic called 'Red Prince: Beyond the Throne'. This fanfic focuses on the Red Prince's relationships with other characters in a more in - depth way. It shows how his actions and decisions are influenced by those around him. The author does a great job of creating a believable and immersive world within the context of Code Geass, and the Red Prince is portrayed in a very interesting light.
There's also 'Brotherhood in Code Geass'. This fanfic focuses on the unbreakable bond between Lelouch and his brother. The OC in this story is a catalyst for change. It's filled with action - packed scenes and emotional moments that will make any Code Geass fan love it.
One great male reader Code Geass male OC fanfic is 'The Hidden Power'. It has an engaging plot where the male OC has a unique Geass ability that sets him on a path to change the world of Code Geass. The story does a great job of integrating the OC into the existing Code Geass universe, with well - written interactions with the main characters.
One great 'Code Geass' female Suzaku fanfiction is 'Suzaku's New Path'. In this fic, the author gives a unique perspective on Suzaku as a female character. It delves into how her relationships, especially with Lelouch, might change. The story is full of emotional depth and interesting plot twists that keep you hooked from start to finish.
First, study the existing world of Code Geass. Know the politics, the social hierarchy, and the technology. For example, if your OC is a Britannian, they should act according to the values and norms of that society. Second, give your OC a clear motivation. It could be revenge, love, or a desire for power. And third, don't make them overpowered. Even if they have a special ability, it should have limitations.
One idea could be an OC who is a commoner but has a unique power that gets noticed by Lelouch. For example, the ability to manipulate sound waves which could be used for both stealth and attack. Another could be an OC from a foreign nation who has different moral and cultural values than the Britannians and Japanese, creating interesting conflicts. Or an OC who is a brilliant scientist working on a secret project that could change the balance of power in the Code Geass world.
One great Marianne fanfic is 'The Lost Queen'. It delves into her backstory before the events in Code Geass. The author does an amazing job of portraying her character, showing her strength and intelligence. It also gives some interesting insights into her relationship with other important characters in the series.
One great 'Code Geass Haro' fanfic could be 'Haro's Adventure in Code Geass World'. It's a fun read where Haro gets involved in the complex politics and battles of the Code Geass universe. It gives Haro a unique personality and role that's different from its usual appearance in Gundam-related stuff.
Well, a popular type of fanfiction in this area is the 'what if' scenarios. What if Lelouch from Code Geass was a mage in Fairy Tail? How would his strategic mind and Geass power change the dynamics of the Fairy Tail guild? Or what if Natsu from Fairy Tail was in the Code Geass world? He'd probably just barge into all the political mess and try to solve it with his fists and fire magic.