The OC's personality can be very distinct. They could be extremely humorous and use that to lighten the mood during tense situations. This would be different from the more serious natures of some of the Justice League members like Batman. Also, they could have a strong moral code that is not exactly the same as the League's, which would lead to interesting discussions and interactions.
Obviously Batman himself is a key character. Then there could be characters like Catwoman, who has a long - standing relationship with Batman. Wonder Woman could also be part of the harem, given her strong connection to Batman in some storylines. And perhaps Batgirl, as she has a close relationship with Batman in the comics.
One common theme is the exploration of relationships. With the harem concept, there are multiple romantic or platonic relationships being developed between the Justice League members and other characters.
There probably is. Fanfiction communities often have a variety of works. In the case of a 'Naruto Justice League Harem' fanfic, it's possible to find ones that stay away from inappropriate content. They may instead focus on the unique mash - up of the Naruto universe and the Justice League universe, and how the harem aspect affects the group dynamics and storylines in a clean and interesting way.
Another theme is power dynamics. Naruto is a powerful ninja, and the Justice League members also have their own superpowers. In the harem scenario, the power balance between them is constantly shifting. Sometimes Naruto might be the dominant one in a situation, while other times, a Justice League member's power might come to the fore. It makes for some exciting plot developments.
One common theme is the outsider - insider dynamic. The OC is usually an outsider who enters the world of the Justice League and forms relationships. Another theme is the exploration of different powers and how they interact within the harem.
A plot could revolve around a new villain that targets the Justice League, especially because of Spiderman's presence in the harem. The villain might see Spiderman as a weak link or an interesting addition to their plans. So, the story would be about the Justice League, including Spiderman, coming together to defeat this threat. Along the way, Spiderman's relationships with the harem members like Hawkgirl and Cyborg could evolve, with some characters growing closer and others having some misunderstandings.
Yes, there are quite a few. You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Just search for the key terms 'Harry Potter Justice League Harem' and you'll likely find some interesting reads. However, the quality can vary greatly, so it might take some time to find one that really suits your taste.
First, you need to do your research on both universes. Know the characters, their powers, and their personalities well. For the harem part, decide which characters will be part of it and how their relationships will develop. Maybe start with a plot device like a magical object that links the two worlds. Then, gradually introduce the characters to each other. Write engaging dialogues that show the different cultures of the two universes.
Naruto can fit in through his skills. His ninja abilities like shadow clones and rasengan can be very useful in the Justice League's battles. This would make him a valuable member and catch the attention of the female characters. For instance, his clones could be used for reconnaissance or distraction in a fight, impressing the likes of Batgirl or Zatanna.