One possible fanfiction could be about Lena Luthor becoming a mentor to young Kara Danvers. Lena, with her intelligence and resources, could help Kara understand the complex world around her while also learning to control her powers better. Maybe Lena discovers Kara's identity early on and decides to guide her in secret, away from the prying eyes of Lex Luthor and other potential threats.
In a fanfiction, perhaps there is a threat to National City that only Kara and Lena can stop together. Young Kara, with her raw power, and Lena, with her strategic mind. They start off not trusting each other completely, but as they face challenges, they learn to rely on one another. For example, there could be a villain who has a device that can nullify Kara's powers, and Lena has to figure out how to reverse it while Kara buys her time.
Kara and Lena are both strong, interesting characters on their own. Kara is Supergirl, with her powers and moral compass, and Lena is a brilliant scientist and businesswoman. When you put them together in a fanfiction, especially in a romantic context as in the 'lemon' genre, it creates a really appealing combination. Fans are drawn to seeing how their powers and personalities interact, and how they might overcome obstacles in a relationship. It's also about the exploration of the 'forbidden' or 'taboo' nature of their relationship in some cases, which adds to the allure.
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.
It can be portrayed as full of mistrust. In the nightmare, they might constantly suspect each other of having ulterior motives. For example, Kara might think Lena is secretly working with her enemies, and Lena might think Kara is hiding something important from her.
One possible scenario could be Kara losing her powers in the nightmare and being unable to protect Lena from some unknown threat. Another might be Lena turning against Kara due to some false information in the dream world.
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.
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.
Lena Luthor does appear in the comics. Her character has evolved and played significant roles in various story arcs. Sometimes her actions and decisions have a big impact on the overall plot.