A common theme is teamwork. Since they both are strong characters from the DC universe, many fan fictions explore how they can combine their powers and skills to fight villains. For example, in stories like 'United We Stand', they team up against a powerful threat to Metropolis and Gotham.
Well, 'Nightwing and Power Girl: Allies in the Shadows' is a cool fan fiction. It delves deep into how their different powers and personalities complement each other. There's also 'A New Bond' where they start off as reluctant partners but end up forming a strong friendship.
A great fanfic in this case would be one that stays true to the characters' personalities. Power Girl is strong - willed and confident, and Nightwing is agile and intelligent. If the writer can capture these traits while also creating an interesting plot, it's a good start. For example, a story where they team up to fight a common enemy in a way that showcases their individual skills.
It's hard to say who the 'best' is as it depends on personal taste. However, some popular writers in the fanfiction community might be those who have a deep understanding of both characters' personalities and can write engaging action scenes. For example, some writers who have been around for a while and have a large following might be considered good at writing their stories.
Archive of Our Own (AO3) is another great place. It has a very user - friendly interface. You can search for 'nightwing and power girl fanfiction' either by the characters' names or by using relevant tags. There are different categories and ratings, so you can find the type of story you're interested in.
One interesting storyline could be them teaming up against a common enemy from another dimension. They both have unique powers and skills, so seeing how they combine their abilities to fight would be great.
The fanfiction 'A New Bond' is also worth checking out. It starts with a chance encounter between Nightwing and Power Girl. As the story progresses, they discover that they have more in common than they thought. The author does a great job of exploring their individual backstories and how those experiences shape their relationship in the story. There are some emotional moments as well as some light - hearted banter between the two characters.
You can start by looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fanfics, and you can use their search functions to specifically look for Power Girl and Nightwing fanfics. Just type in the names in the search bar, and you'll likely get a bunch of results.