A good fanfiction idea could be to put the characters in a modern-day city setting. Imagine the Diabolik Lovers vampires trying to adapt to the bustling life of a big city like Tokyo, and then they run into the Vampire Knight characters who have their own set of rules and hierarchies. It could lead to all sorts of interesting interactions, from power struggles to unexpected alliances. You could also focus on a love triangle between a character from each series and a new original character.
You could write a fanfiction where the worlds of Diabolik Lovers and Vampire Knight are on the brink of war. Maybe there's a shortage of blood in both worlds and they start to blame each other. The fanfiction could follow the journey of a group of characters from both series who are trying to find a solution to prevent the war and also discover the true reasons behind the blood shortage. This would allow for a lot of character development and exploration of the different vampire cultures in both series.
In Diabolik Lovers, Ayato is often a popular character in fanfiction. His brash and confident personality makes him an interesting subject. Subaru is also quite popular, with his brooding and somewhat tortured nature. For Vampire Knight, Zero is a very common character in fanfiction. His struggle between his human and vampire sides is a rich area for exploration. Kaname is also popular, given his complex character and his role in the Vampire Knight story.
One common theme is romance. Given the nature of both series with their vampire characters, there are often love stories between human and vampire characters. For example, in Vampire Knight, there are fanfictions that explore deeper relationships between Yuki and the vampire boys.
Another option is to check out Tumblr. Some bloggers post their own fanfictions or reblog interesting ones. You can follow relevant tags like #VampireKnightFanfiction or #DiabolikLoversFanfiction to stay updated on the latest works.
One great fanfiction is 'The Hybrid's Redemption' in the Vampire Diaries fandom. It gives a new take on Klaus's character, showing his journey towards redemption in a really engaging way. Another for Diabolik Lovers is 'A New Beginning'. It changes the typical power dynamics among the characters in an interesting manner.
There's also 'A Vampire Hunter's Redemption in Diabolik Lovers'. This fanfic focuses on a vampire hunter who is trying to make amends for past mistakes while being in the world of the diabolik lovers vampires. The character development is really well - done here.
One common theme is the struggle between love and duty. The vampire hunter is often conflicted because they are attracted to the vampires they are supposed to hunt. Another theme is the power dynamic. Vampires are generally more powerful, but the hunters have their own skills and wits to rely on.
One idea could be a crossover with Vampire Knight. The Diabolik Lovers vampires could interact with the ones from Vampire Knight in a school setting. There could be rivalries over territory or a common prey. Another idea is a crossover with Black Butler. Sebastian could be hired to deal with the unruly Diabolik Lovers vampires, creating a lot of tense and interesting scenarios. A third idea might be a crossover with Ouran High School Host Club. The vampires could accidentally end up at the host club and chaos would ensue as they interact with the flamboyant hosts.
A friendship - centered fanfiction would be cool. Maybe a new character befriends the vampires not out of fear but because they see the good in them. This character could slowly break down the walls the vampires have built around themselves and change their relationships with each other.
Good 'Diabolik Lovers' fanfiction often has well - developed characters. It delves deeper into the personalities of the vampires and their human counterparts, showing their growth and change over time. For example, it might explore how a character overcomes their fears or insecurities.
She would likely have enhanced senses. Her vision could become sharper, allowing her to see in the dark like the other vampires. Her sense of smell might also improve, which could help her detect the presence of other vampires or even humans from a distance. This could change the power dynamics in the relationships she has with the vampire boys in the story.