Well, often OCs that have a complex relationship with the main characters are popular. For instance, an OC who is a vampire that becomes a rival to one of the main vampires in Vampire Knight Pendragon for the love of a human. Also, OCs that bring a new element to the story, like an OC who has a magical artifact that can change the rules of the vampire - human world. And OCs that are morally ambiguous, such as a half - vampire half - human who sometimes sides with vampires and other times with humans depending on the situation, can be very popular in the fanfiction world.
In Vampire Knight Pendragon fanfiction, OCs that are hybrids of different supernatural beings are often popular. For example, an OC who is a vampire - werewolf hybrid. They have the strength and allure of a vampire and the wildness of a werewolf. Another popular type of OC could be an OC who is a vampire with the ability to transform into different forms, like a bat or a mist. These types of unique OCs can attract a lot of readers because they add a new and exciting dimension to the existing Vampire Knight Pendragon universe.
Zero is often very popular. His complex character, being a vampire hunter with vampire blood himself, makes him full of contradictions and depth. Fans are intrigued by his internal struggle between his human side and the vampire instincts within him.
One of the popular OCs is often a character with a mysterious past. For example, an OC who was raised in a far - off land and has unique skills or knowledge. Readers are drawn to such characters because they add an element of mystery and novelty to the story.
Well, it really depends on different readers' preferences. However, OCs that are strong - willed and have unique abilities tend to be popular. For example, an OC who can communicate with the native creatures in the 'The 100' world might be really liked. They can use this ability to gain information or even form alliances, which makes them stand out.
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.
For Vampire Knight Pendragon OC fanfiction, an OC could be a time - traveler who accidentally lands in the middle of the vampire - human conflict. This OC would have to use their knowledge of different eras to try and find a solution. Another concept is an OC who is a vampire - hunter but has a change of heart when they learn more about the vampires in the Vampire Knight Pendragon world. Maybe they fall in love with a vampire. And finally, an OC who is a lost heir to a powerful vampire family in the story could be an exciting idea. Their arrival could disrupt the existing power balance and create a whole new set of storylines.
Zero is definitely one of the most popular. His complex personality, being a vampire hunter yet having the vampire curse within him, makes for great storytelling. Yuki is also popular. Her torn feelings between her human side and her connection to the vampires, especially Kaname, give a lot of room for emotional exploration. Kaname himself is a favorite. His mysterious nature and his role as a powerful vampire leader provide many angles to write from.
Another popular OC is a child prodigy who is a master of piloting. In the fanfiction, they team up with Master Chief and use their piloting skills to get them out of tough situations, like escaping a Covenant blockade. Their innocence combined with their amazing talent makes them a favorite among readers.
There could be an OC that is a healer. In a world full of battles and danger like Highschool DxD, a healer OC is very much needed. This character is popular as they are the ones who can save the lives of other important characters. They are often written as kind - hearted and selfless, which also adds to their popularity.
Some popular OCs could be those who bring a new skill or talent to the Robertson family. Maybe an OC who is an expert in some new hunting technique or a master at cooking a unique type of food. Their skills make them stand out and be well - liked among the characters in the fanfiction. In addition, OCs that have a heartwarming backstory and overcome difficulties are also quite popular as readers can relate to their struggles and growth.
One popular OC type is the powerful trainer OC. They often have unique skills or a special bond with their Pokemon that makes them stand out. For example, an OC who can communicate telepathically with their Pokemon.