Some fanfictions give Tsukune the power of transformation. He can transform into a more powerful vampire form, with wings and increased physical capabilities. This not only looks cool but also gives him an edge in battles. It also shows his growth as a character, from a somewhat weak human - turned - vampire to a powerful force in the Rosario Vampire world.
In fanfiction related to Tsukune's powers in Rosario Vampire, writers often explore his relationship with other characters through his powers. His powers can be a source of conflict or cooperation. For instance, his growing powers might make some of his human friends wary, while also attracting the attention of more powerful vampires who want to either use him or destroy him. It's a rich area for creative storytelling.
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.
Ginei is a character that can't be ignored. His werewolf nature and his rivalry with Tsukune, especially when Tsukune has godlike powers, can create a lot of tension. He could be trying to prove himself as strong as Tsukune or trying to take over the leadership at the academy. Also, Ruby with her unique vampire powers and her connection to other characters can be a very popular character in the fanfiction.
First, know the characters well. Tsukune is a complex character with his own growth arc. Make sure to stay true to his personality. Also, understand the world of Rosario Vampire, like the different monster species and their cultures. Then, come up with an interesting plot. It could be a new adventure for Tsukune or a different take on his relationships.
Tsukune's vampire form in fanfiction can vary greatly. Some authors might focus on the emotional aspect of him dealing with this new side of himself. He could struggle with the urge to feed on blood, or he might embrace it as a part of his new identity. Additionally, his relationships with other characters, especially Moka, can be significantly affected by his vampire form.
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.
One popular theme is romance. Given the relationship between Tsukune and the other characters in the Rosario Vampire world, it's common to see fanfictions exploring the romantic relationship between Tsukune and Tsurara. It could be about how they first fall in love or overcome obstacles in their relationship.
A third plotline could be a love triangle situation where Tsukune is caught between his feelings for other characters in the Rosario Vampire series and his growing closeness to Kahlua. This could lead to a lot of emotional drama, with Kahlua trying to win Tsukune's heart while Tsukune is conflicted about his own emotions.
One popular trope is the 'fish out of water' aspect as Tsukune, a human, is in a school full of monsters. Another is the development of his relationships, like his romantic relationship with Moka. There's also the trope of him having to prove himself in a world where he's initially seen as weak.
A possible fanfiction could focus on a love triangle between Kurumu, Tsukune and another character. Kurumu is deeply in love with Tsukune, but Tsukune is conflicted as he has feelings for Kurumu but also has responsibilities towards others. This would lead to a lot of emotional drama and interesting character interactions.