AO3 is probably the best place to find high - quality Alex Danvers and Lena Luthor fanfiction. It has a tagging system that makes it easy to filter stories based on your preferences, like if you want a story with a specific genre or rating. Additionally, Tumblr often has fanfic recs (recommendations) from the fandom. You can search for tags related to their relationship on Tumblr and might find some great suggestions there.
One great Alex Danvers and Lena Luthor fanfiction is 'The Bond Beyond'. It focuses on their unexpected friendship turning into a powerful alliance to save the city. Another good one is 'Unlikely Partners' which delves into their different worlds colliding in a scientific adventure. And 'Shared Secrets' shows how they gradually open up to each other about their past traumas and grow closer as a result.
One great Lena Luthor and Alex Danvers fanfiction is 'Allies in the Shadows'. It really delves into their complex relationship as they team up to solve a mystery within the Supergirl universe. The author does an amazing job of showing their different personalities clash and then gradually come to understand each other better.
I really like 'Lena and Kara: A New Beginning'. In this fanfic, the author delves into their backstories and how those shape their present interactions. It also has an interesting plot where they have to work together to save their city from a new threat. It's full of action and emotional moments.
There's also 'Heartbeats in Harmony'. In this fanfiction, Kara and Lena face a common enemy that forces them to rely on each other even more. The story is filled with action scenes and at the same time, the development of their relationship is at the forefront. It's a great read for fans of the two characters.
Another theme is friendship. They often start as acquaintances or even adversaries and then develop a deep friendship. In some fanfictions, this friendship is what helps them both grow as individuals. Like, Lena becomes more open and less guarded, and Alex becomes more understanding of the gray areas in people's personalities.
Another theme is redemption. In some fanfics, Lena is often on a journey of self - redemption, trying to prove that she is not like the other Luthors. Alex can play a big part in this, either by believing in her from the start or gradually coming to see her true self. Fanfics like 'Lena's Path' explore this theme in depth, showing how their relationship is intertwined with Lena's quest for redemption.
Another place to look could be FanFiction.net. However, the content on there can be a bit more hit - or - miss in terms of quality. But it's still worth a shot. You may have to dig through some pages to find the really good Kara Danvers x Lena Luthor fanfictions. And make sure to check the ratings and reviews if available to ensure it's the kind of story you want to read.
You can find them on Archive of Our Own (AO3). It has a vast collection of fanfics, and there are many great 'kara danvers x lena luthor' ones there.
One great 'kara danvers x lena luthor fanfiction' is 'Red Kryptonite and the Luthor Heiress'. It has an interesting plot where Kara's exposure to red kryptonite leads to some unexpected interactions with Lena. The characterizations are really well - done, making it a must - read for fans of this pairing.
There's also 'The Unlikely Bond'. This fanfic focuses on how Alex and Lena, coming from different backgrounds (Alex as a DEO agent and Lena as a Luthor), gradually form a deep and trusting friendship. It shows their interactions in various situations, like during a city - wide crisis and in more personal, quiet moments.