First, understand the characters well. Kara is kind - hearted and protective, so your OC should interact with her in a way that makes sense for her personality. For example, if your OC is more brash, there could be some initial conflict that then develops into a deeper connection.
Fanfiction.net is also a great place to look. It has a large collection of fanfictions for various fandoms, including Detroit: Become Human. However, the quality can vary, so you might need to skim through a few to find ones that really focus on the OC x Kara relationship in a way that you like.
They could form an alliance to expose a conspiracy within CyberLife. Connor uses his access to the company's systems and Kara's ability to connect with other androids on an emotional level to gather evidence and bring the truth to light.
One great Connor and Kara fanfiction could be about them teaming up to save a group of androids from a deviant - hunting squad. They use their unique abilities, Connor's detective skills and Kara's nurturing nature, to outwit the humans and lead the androids to safety.
Another idea is Kara getting separated from Alice and Connor during their journey to freedom. She then has to rely on her own wits and the kindness of some humans she meets along the way. This could lead to her having to make difficult decisions, like whether to trust a human who seems friendly but might be leading her into a trap. It would be a great exploration of her character's growth and her ability to adapt in tough situations.
One popular plot theme is the unlikely alliance between Connor and Kara. They come from different paths in the game's world, but in fanfiction, they might team up to protect other androids. For example, they could work together to rescue a group of androids from a dangerous situation in a CyberLife facility. Another theme could be the exploration of their emotions towards each other. As androids starting to feel, they might develop a unique bond that goes beyond just friendship or comradeship. It could be a slow - burn relationship where they gradually understand each other on a deeper level.
Create a compelling plot. It could involve a mystery that Connor and the OC have to solve together, perhaps something related to the android revolution in the game's world. Don't just focus on the romance. Incorporate elements of the game's themes such as what it means to be human, the rights of androids, etc. This will make the fanfiction more engaging and true to the source material.
Writers often start by having Connor and Kara meet in a tense or unexpected situation. This could be during a raid on an android hideout where Kara is hiding with Alice and Connor is initially there to investigate. From there, they gradually start to see each other's point of view. As Connor begins to deviate, he realizes that Kara's actions are out of love and protection, not just simple disobedience. This shared understanding forms the basis of their relationship development.
No, it is not appropriate. 'Detroit: Become Human' is a game with complex themes about androids and humanity. Writing sexual fanfic involving its characters goes against the intended nature of the work and can also be considered disrespectful to the game's developers and the wider fan community.
A great Kara Detroit: Become Human fanfiction could be set in an alternate universe where Kara is a detective - like android. She uses her unique skills and empathetic nature to solve crimes that involve both humans and androids, and in the process, she challenges the existing prejudices between the two groups.