One popular theme is friendship - to - lovers. Many fanfics start with Alex and Lucy being just friends or colleagues and then slowly developing romantic feelings for each other. For example, in some fanfics, they bond over their shared experiences in the military or in the fight against supervillains.
One great Alex Danvers and Lucy Lane fanfic is 'Parallel Paths'. It delves into their relationship as they work together on a top - secret project in National City. The story is full of action and their slow - burn romance is really well - written.
I'd recommend 'The Danvers Sisters' Journey'. It focuses on their growth as individuals and as sisters. It has some really heartwarming moments, like when they have late - night talks and share their deepest fears. It also shows how they deal with the villains in their own unique ways, all while strengthening their relationship.
In many of these fanfictions, a theme of mutual support and growth is present. Kara might help Lucy understand the world of superhumans better, and Lucy could support Kara in dealing with her human side. Also, the theme of discovery, both of each other's true selves and of their feelings, is quite common. They start as acquaintances or even rivals perhaps, and then gradually realize their love for each other through various events and interactions.
One possible fanfic could focus on a mission gone wrong that leads to both Alex and Kara experiencing PTSD. In the story, they might initially try to hide their symptoms from each other. Kara could be having nightmares about not being able to save the people she loves during the mission, while Alex might be jumpy and overly vigilant. As the story progresses, they finally open up to each other and start to heal together, perhaps through some shared training sessions that also double as therapy, where they learn to trust themselves and each other again.
A good 'Alex Danvers and Kara Danvers Fanfic' has to capture their unique relationship. Since they are sisters, it should show the love, bickering, and support that comes with that. For example, if it has a scene where Alex is training Kara and is tough on her but also encourages her, that's great.
You can try websites like Archive of Our Own (AO3). It has a vast collection of fanfictions, and you can easily search for Kara Danvers and Lucy Lane love stories there. Fanfiction.net is also a popular option. Just use their search functions to look for specific pairings.
Another theme is the idea of finding one's place. Ruby, being a young character, is often on a journey to figure out where she belongs in the world. And Alex, with her own experiences, helps Ruby in this quest. In some fanfics, this is shown through Ruby joining Alex in her superhero activities and realizing that's where she wants to be.
One possible fanfic could focus on how they support each other through their PTSD episodes. Alex, with her military background, might have PTSD from combat situations. Kara, having lost her planet and family, also has her own traumas. They could share their nightmares and fears, and use their superpowers in non - physical ways to comfort each other, like Kara using her heat vision to create a warm and calming environment when Alex is having a flashback.