One of the common themes is rivalry. Since they are both involved in the same kind of activities, their competitive nature towards each other is often depicted. Also, the theme of mentorship can be seen sometimes, with Ryuga being a sort of mentor to Kenta in some fanfictions.
One popular ryuga and kenta fanfiction is 'The Bond of Ryuga and Kenta'. It focuses on their friendship and the adventures they go through together. Another one might be 'Ryuga's Influence on Kenta', which shows how Ryuga's actions and character shape Kenta's growth in the story.
One potential match could be a fellow dark - side blader who has a change of heart. They would understand Ryuga's past and the struggles he has faced in the world of Beyblade. Together, they could try to break free from the darker aspects of their lives. Or perhaps a mysterious newcomer to the Beyblade world. This character could bring a fresh perspective to Ryuga's life. She could be intrigued by Ryuga's power and presence, and Ryuga, in turn, would be curious about her different way of looking at things. Their relationship could be based on mutual discovery and attraction.
Fanfiction often takes existing characters and gives them new life. In the case of 'ryuga and hikaru lemon fanfiction', the author may have been inspired by the original source material of these characters. Maybe they saw potential in a relationship between Ryuga and Hikaru that wasn't fully explored in the original. It could be a romantic relationship, a platonic partnership, or something more complex. The 'lemon' aspect might imply some sort of citrus - themed or fresh and zesty element in the story, but without more context, it's difficult to be certain.
The setting of the story also plays a crucial role. If it's set in a modern - day world with a hidden vampire society, Kenta's situation as a hypnotized slave becomes even more intriguing. How does he interact with the normal world while being under the control of the chibi vampire? Does he have any allies who might help him break the hypnosis? These are all elements that could be explored in the fanfiction.
The OC could be a healer in the blading world. Ryuga gets seriously injured during a battle. The OC takes care of him and during his recovery, they start to bond. Ryuga, who is usually so tough and independent, finds himself relying on the OC. This newfound closeness makes him question his own feelings. They could then go on a journey together to find a rare blading item, with their relationship evolving along the way.
Well, one frequent theme is the power dynamic. Ryuga is a powerful figure, and fanfictions may explore how the reader fits into that. It could be that the reader is in awe of his power at first and then gradually becomes an equal. Another common theme is redemption. Ryuga might be portrayed as a character who needs to be redeemed, and the reader plays a role in that process. There's also the theme of friendship evolving into something more, which is really popular in this type of fanfiction.
You can try searching on fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'beyblade yu x kenta' in the search bar and see what comes up.
Some fanfictions may also explore a bit of rivalry. Even though they are friends, there could be a healthy competitive side to their relationship. This can add an interesting dynamic to the stories, with them constantly trying to outdo each other in Beyblade battles, but still maintaining their bond of friendship.
The plot could center around Kenta's journey to regain his free will. He may start to have small moments of resistance against the hypnosis as he discovers the true nature of the chibi vampire's intentions. Along the way, he might meet other characters who either help or hinder his quest.