Harry Potter himself is also a common focus. His role as the hero in his own world could lead to some interesting scenarios when he meets the goddesses. Maybe he has to learn to work with them to save both the wizarding world and the world of the goddesses. Also, Belldandy from Oh My Goddess might be a popular character in these crossovers. Her kind and gentle nature could contrast with the more often - serious wizards in Harry Potter, and she could bring a new perspective to the story.
Well, one interesting concept could be the merging of the magical world of Harry Potter with the unique deities and settings from Oh My Goddess. Maybe it involves the Hogwarts students interacting with the goddesses, like how they would react to their otherworldly powers.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. These platforms usually have a wide variety of fanfictions related to different series, including 'Oh My Goddess!'. Just use the search function and type in 'Oh My Goddess Keiichi and Dark Urd' to see what's available.
There are quite a few interesting ones. Some might focus on unique crossovers between the Naruto world and the Oh My Goddess universe. For example, a fanfiction could explore how the characters from Naruto interact with the goddesses in the Oh My Goddess world, perhaps in a joint adventure to save both their realms from a common threat.
The appeal also lies in the fact that it can attract fans from both the 'oh my goddess' fandom and the other fandom involved in the crossover. It's like a meeting point for different fan communities. Fans get to see how the unique aspects of 'oh my goddess', such as the goddesses' powers and the mythology in the series, can be integrated with the elements of another series. This can lead to some really creative and unexpected plot twists and character developments.
Well, Archive of Our Own (AO3) is also a great place to find 'oh my goddess crossover fanfiction'. It has a wide range of works. You might find crossovers with other popular series like 'Sailor Moon' or 'Fate/stay night' there. Some of these crossovers offer unique takes on the 'oh my goddess' universe by combining it with different story elements and characters from other franchises.
The goddess could also be an original creation for the fanfiction. A being with a unique set of powers like the ability to control time and space. This goddess could be betrothed to Harry to stop an impending doom that threatens both the wizarding and Muggle worlds. Her powers would be so great that she needs Harry's connection to the wizarding world to fully utilize them and save the day.
It could be Athena. Athena is known for her wisdom in Greek mythology. She could pass on her wisdom to Harry, making him not just a powerful wizard but also a very wise one. He could use this wisdom to solve problems in the wizarding world in a more strategic way.
The goddess could be an ancient Celtic deity. In the fanfiction, the author might choose a Celtic goddess because of the rich magical lore associated with them. For example, Morgan le Fay from Arthurian legend could be reimagined as a goddess in this context, and she could adopt Harry due to her interest in powerful magic users.