Another theme is rivalry. Some fanfictions play up the idea that they are rivals, especially when it comes to matters of love or popularity in the school. They might compete for the attention of a male character or for the top position in a school event. This rivalry can add a lot of interesting twists and turns to the story.
The theme of self - discovery is also present. In some fanfictions, Moka and Kurumu go through experiences that make them question who they are and what they really want. For example, they might face a situation where they have to choose between their own kind's way of life and their friendship, which leads them to a journey of self - exploration.
In a fanfiction, Moka and Kurumu could go on a journey together to find a rare artifact that is said to have the power to enhance a vampire's strength. Along the way, they face various challenges and obstacles. This could also be a chance for them to deepen their friendship. They might have to work together to solve puzzles and defeat enemies who are also after the artifact.
One popular theme is the development of their relationship. Fans love to read about how Kurumu's initial infatuation with Tsukune grows into a deeper, more meaningful connection. Another theme is adventure. They often go on quests or face challenges together, like fighting against powerful enemies in the Rosario Vampire universe.
Perhaps in the fanfiction, there is a love triangle situation where a new character is interested in Moka, and Kurumu feels jealous because she has her own unspoken feelings for Moka. This could create a lot of drama and tension in their relationship. Kurumu might try to prove herself better than the new character to win Moka's attention, while Moka is oblivious to Kurumu's real feelings.
One great fanfiction could be where Moka and Kurumu team up to solve a mystery in the Rosario Vampire world. Maybe they are trying to find out the origin of a new, powerful dark force that has been causing chaos in their school. In this fic, their different personalities would create interesting dynamics as Moka's calm and collected nature contrasts with Kurumu's more passionate and impulsive side.
The theme of friendship within the Rosario Vampire world is also quite common in Moka - related fanfictions. Moka's friendships with other characters like Kurumu, Yukari, etc., are explored. How they support each other through various challenges in the school, whether it's dealing with other supernatural creatures or facing academic difficulties, is often a part of these fanfictions.
One common theme is love and romance. Kurumu is often involved in love triangles or her pursuit of love, which is a big part of the Rosario Vampire story. Another theme could be her struggle with her monster nature while trying to fit in with humans or other supernatural beings at the school.
One great fanfiction could be one where Kurumu and Tsukune go on a secret adventure together in the Rosario Vampire world. It might involve them facing a new type of monster that no one has ever seen before. This would test their relationship and how well they can work together.
There are also fanfictions that focus on the internal struggles of the characters. Kurumu's nature as a succubus might lead to her having insecurities about her relationship with Tsukune, fearing that her instincts could harm him. Tsukune, on the other hand, may struggle with his own identity as a human in a world full of yokai. These internal conflicts add depth to the characters and the fanfiction.
There are also fanfictions that focus on the backstories of Tsukune and Moka. Maybe exploring Moka's past as a vampire, her family history, and how Tsukune fits into all of that. Or looking at Tsukune's life before coming to the school and how it has influenced his relationship with Moka.
The popularity might be due to the interesting dynamic between Tsukune and Kurumu. Tsukune is a human in a world of monsters, and Kurumu is a succubus with strong feelings for him. Their relationship is full of tension and potential for growth.