Yes, there are quite a few. You can find some on popular fanfiction websites. Just search for the tags related to Kara Danvers and Black Widow's relationship. Some of them explore their friendship turning into a deeper love, with interesting plotlines that combine the different universes they come from.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfictions, and you can easily search for Kara Danvers and Black Widow love stories using the search function.
One common theme is the clash of their different worlds. Kara from a more idealistic world in Supergirl and Black Widow from the darker Marvel universe. Another is the mutual understanding they develop despite their differences.
Yes, there are quite a few. In some fanfictions, their relationship begins during a cross - universe event where they are forced to work together. Kara's superpowers and Black Widow's combat skills make for an exciting combination. As they spend more time together, they start to understand and care for each other on a deeper level, which is really well - written in some of these fanfictions.
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 idea could be a story where Oliver Queen finds himself in Kara's universe by some sort of multiverse accident. He teams up with Kara to fight a common enemy that is causing chaos in both their worlds. Their different fighting styles, Oliver's more grounded archery and hand - to - hand combat and Kara's super - powered abilities, would make for an interesting dynamic in battles.
You can find male Kara Danvers fanfiction on Archive of Our Own (AO3). It has a large collection of fanfictions related to various characters, including Kara Danvers with male - centered stories.
There are quite a few 'Naruto and Kara Danvers' fanfictions out there. You can start by looking on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Some might focus on their adventures together in a crossover universe, while others could explore a unique friendship or mentorship between them.
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.
One possible scenario in such a fanfiction could be that Kara gets physically hurt during a fight against a powerful enemy while Lena is desperately trying to find a way to save her. Maybe Lena uses her scientific knowledge to develop a new device that can heal Kara's injuries. This would show the deep bond between them as Lena risks everything to save Kara.