Writers often start with giving the OC a unique backstory. For example, if the OC is a Jedi - in - training, they might have a troubled past that led them to the Jedi Order. This backstory then influences how they interact with Rex. They also give the OC distinct personality traits. If the OC is shy, their relationship with Rex might start slowly as they open up.
Another way is by showing character growth. The OC might start off as naive about the Clone Wars but as they experience more battles and interact with Rex, they become more worldly. Rex, on the other hand, might start to question some of his military training and beliefs because of the OC. This mutual influence on each other's development is a key aspect in Rex x OC fanfictions. Also, physical descriptions play a role. If the OC has a unique appearance, like having a rare hair color or a specific tattoo, it can make them stand out and affect how Rex perceives them.
In many cases, the writers develop the characters through the situations they put them in. Say, if there's a battle and the OC has to save Rex's life. This not only shows the OC's courage but also deepens their connection. Writers also use dialogue to develop the characters. The way Rex and the OC talk to each other can reveal a lot about their personalities and how they feel about each other. For instance, if Rex is always formal in his speech to the OC at first and then gradually becomes more relaxed, it shows his growing comfort with her.
In many fan - created stories, Ahsoka's character often develops by becoming more independent. For example, she might learn to rely less on the Jedi Council's teachings and more on her own instincts. Rex, on the other hand, may develop a stronger sense of morality outside of just following orders. He could start to question some of the more morally ambiguous commands given during the Clone Wars.
One great example could be 'A Clone's Heart'. In this fanfiction, the relationship between Rex and the OC develops gradually. The OC is a medic on the battlefield, and their interactions start with Rex getting injured. Another is 'Love in the Midst of War' where the OC has special Force - related abilities that draw Rex's attention. They face many challenges together, including dealing with the politics of the Clone Wars.
One great Rex fanfiction is 'Rex's Redemption'. It shows Rex in a post - Clone Wars scenario, struggling with his past and finding a new purpose. It's really engaging as it delves deep into his character.
Fanfics usually depict Rex and Cody as having a deep mutual respect. In 'The Bond of Brothers', it's clear that they rely on each other not just as comrades but as friends. They are shown to be very protective of each other. Rex might be the first to jump into a fight to protect Cody, and vice versa. Their personalities are also brought out through their interactions with other characters. When dealing with Jedi generals, Rex is more reserved while Cody is more open to communication, as seen in 'Clone - Jedi Relations' fanfic.
In the fanfiction, make their journey a central part. Show how they grow in power and influence. They could start as a relatively unknown Sith but gradually become a major threat. Maybe they form an alliance with some separatist leaders, using their Sith powers to manipulate them and gain more resources for their own dark purposes.
I'd recommend 'Rex in the Underworld'. It takes Rex into the seedy underbelly of the Star Wars universe. It's a dark and gritty take on his character that really stands out.
One great Rex and Cody fanfiction is 'The Brothers in Arms'. It really delves into their relationship during the Clone Wars. It shows how they support each other on the battlefield and also their off - duty camaraderie. The story has some really intense battle scenes that are well - written and it makes you feel like you're right there with them.
One possible fanfiction could be about Rex and Ahsoka going on a secret mission together. They might face a new and dangerous enemy that the Republic has not yet encountered. Rex would use his military tactics and Ahsoka her Jedi skills to overcome the challenges.
One great Captain Rex fanfiction is 'Rex's Redemption'. It delves into his internal struggles during the Clone Wars. It shows how he copes with the morality of war and his loyalty to the Jedi. The story has some really intense battle scenes where Rex's leadership skills shine through.
One possible fem clone OC could be a highly skilled sniper. In fanfiction, she might have unique markings on her armor that distinguish her from the male clones. She could befriend some of the Jedi, like Ahsoka Tano, and together they face various challenges during the Clone Wars.