A significant theme is the idea of saving the new world she enters. Just as she protects Earth in the Sailor Moon universe, in crossovers she often finds herself in a position to help save the world she has crossed over into. This could involve fighting against new villains or resolving conflicts within that world. It shows her as a hero in different contexts and how her values are applied in various fictional settings.
One great 'usagi tsukino crossover fanfiction' is 'Usagi Tsukino in the World of Harry Potter'. It's really interesting to see how Usagi's magical girl powers interact with the magic in the wizarding world. Another one could be 'Usagi Tsukino Meets the Avengers'. The idea of her joining forces with superheroes is full of potential for exciting storylines.
One popular theme is friendship development. Since they are from the Sailor Moon universe, exploring how their different personalities interact and form a strong bond is quite common.
You can try fanfiction platforms like Archive of Our Own (AO3). It has a vast collection of fanfictions on various topics, including those related to Usagi Tsukino and Haruka Tenoh. Just use the search function and type in their names to find relevant stories.
Usagi Tsukino is the beloved manga heroine from 'Sailor Moon'. She starts off as a normal schoolgirl but soon realizes her true identity and purpose. Her character development throughout the manga is quite remarkable. She shows great courage and growth as she battles various villains and protects those she loves.
Love is a very common theme. Since Usagi and Mamoru have a strong romantic connection in the original story, fanfictions often expand on their love, like how they overcome obstacles to be together.
One common theme is the clash and then the fusion of two different worlds. Harry comes from a world of wizards and magic, while Usagi is from a world of sailor senshi and lunar powers. Fanfictions often explore how these two disparate worlds interact and combine.
Common themes include the power of love. In many fanfictions, their love is so strong that it can conquer all difficulties. There's also the theme of protection. Usagi is often depicted as protecting misaki from various threats, whether it's from jealous rivals or difficult situations. And the theme of acceptance is also prevalent, as they accept each other's flaws and grow together in their relationship.
One idea could be a crossover where Ayato Sakamaki, from the Diabolik Lovers universe, and Usagi Tsukino, from Sailor Moon, meet in a modern city. Ayato is intrigued by Usagi's positive energy and Usagi is both scared and curious about Ayato's dark allure. They could form an unlikely friendship and help each other face their respective challenges.
One common theme is friendship. Their friendship often forms the basis of the story, whether it's a new friendship developing or an existing one being tested. Another theme is adventure. They usually go on some sort of journey or adventure together, facing different obstacles along the way.