Well, in many fanfictions, the female Kamen Rider who has a mysterious origin is quite popular. Maybe she's from a lost tribe of riders or has a connection to an ancient power. And characters who are her rivals turned allies are also interesting. They start off competing with her but then realize they have to work together. Also, female characters who are part of a Kamen Rider team and bring a different dynamic to the group are popular in fanfiction.
One popular character is Poppy Pipopapo. She's often a central figure in many fanfictions due to her energetic and bubbly personality. Her unique powers and her role within the kamen rider world make her a great focus for various storylines.
Often, Iron Man from the Avengers and Kamen Rider Decade are popular. Iron Man's high - tech gadgets and intelligence make for interesting interactions with the unique powers of Kamen Rider Decade. They can both be seen as leaders in their respective groups, so seeing them work together or clash in fanfiction can be really engaging.
Another popular character could be Blake Belladonna. Her stealthy nature and her ability to use her shadow clones could interact well with the kamen rider powers. In fanfiction, she might team up with a kamen rider to take on enemies that are difficult to defeat using her normal RWBY abilities alone. For example, a kamen rider's ability to detect hidden threats could complement Blake's stealth skills.
Kamen Rider Decade is often a popular choice. His ability to transform into other Riders makes him a natural for crossovers. He can bring in elements from different series and connect various storylines together.
Natsumi Hikari is a popular character in Kamen Rider Decade fanfiction. She provides a sort of 'normal' perspective in the otherwise extraordinary world of Riders. Writers might explore her growth from being a somewhat reluctant companion to Decade to becoming a more confident and important part of his adventures. Her relationships with other characters, especially Decade, are often a focus in fanfiction.
Naruto is likely to be very popular as he is the main character from his own series. His energetic and determined personality can bring a lot to crossovers. Hibiki too, as the titular Kamen Rider, has his own fan following. His unique design and combat style make him stand out.
Characters from Kamen Rider Decade are also frequently included. Decade has the ability to travel between different Kamen Rider worlds, so it makes sense for him to be in a 555 crossover. His presence can introduce new story elements and bring different Kamen Rider series together in a single fanfiction.
In 'kamen rider paradox oc fanfic', aside from the main Kamen Riders, some of the secondary characters who have unique abilities or relationships can be popular. For instance, the supporting characters who know about the secrets of the Kamen Rider powers or the ones who are involved in the time - space anomalies. They can play important roles in the story with the OC. And sometimes, the villains from the Kamen Rider series can also be key characters as they can create more challenges and paradoxes for the OC to face.
In kamen rider rwby fanfic, Blake Belladonna is a beloved character. Her cat - like features and her complex backstory add depth to any crossover story. She can have some really interesting interactions with Kamen Rider characters. Another popular one is Kamen Rider Kuuga. His primitive yet powerful form makes for an exciting contrast when paired with the RWBY characters. And Weiss Schnee is also a popular choice. Her ice - based powers and her posh personality can lead to some great comical or intense moments when combined with the Kamen Rider elements.
Often, the main character is the kamen rider himself. He is the one with the cool powers and the mission to save the day.