I'm sorry, but I'm not familiar with the specific 'Jayaraj and Fenix' story. It could be a very specific or local story, or perhaps it's something that is not widely known without more context.
One common theme is the clash of different worlds. For example, when Marcus Fenix crosses over into a different game or movie universe, there's always the struggle to adapt to new rules, cultures, and technologies. This can lead to some really interesting scenarios where he has to figure out how to use his skills in a completely new context.
One popular Marcus Fenix crossover fanfiction might be the one where he crosses over with the Halo universe. In it, Marcus brings his unique combat skills and leadership to new and unexpected situations within the Halo setting.
Love and romance are also quite common themes. The OC might be someone who catches Marcus's eye and they develop a romantic relationship over time. This often involves a lot of character development for both as they navigate their feelings in a world full of chaos. Additionally, the theme of redemption can be present. Maybe the OC has a troubled past and Marcus helps them find a new path, or vice versa.
😋I recommend "I'm Pregnant with the Prince Regent's Baby". This is an ancient romance novel. In order to survive, the female protagonist, Ian, decided to hug the male protagonist's thigh. In the end, after rebirth, he found out that the male protagonist was a female supporting character. The male protagonist's true love, the female protagonist, had also been reborn. However, the female protagonist still decided to cling to the male protagonist's thigh and live until the last episode. In the end, the entire court was shocked to find that the emperor was pregnant, so the female protagonist ran away with the male protagonist's child, causing the Regent to be angry and chase after her. This was a poem about a woman. The female protagonist was the emperor, and the male protagonist was the only one who was favored. I hope you like this fairy's recommendation. Muah ~😗
There could be a fanfiction where Marcus Fenix travels to Forks. He discovers the world of vampires and werewolves. Bella Swan is intrigued by his combat skills and they form an unlikely friendship. In this story, they might exchange their different survival skills, with Marcus teaching Bella about combat and Bella showing Marcus how to navigate the complex social hierarchies in Forks.
To write a good fanfiction, focus on character development. Show how Bella and Marcus would change as they interact with each other. Maybe Bella becomes more assertive under Marcus' influence, and Marcus becomes more in touch with his emotions because of Bella. Also, use vivid descriptions. Describe the settings, whether it's the dark and dangerous world of Marcus or the misty Forks of Bella's world. This will draw the readers in.
One popular Marcus Fenix x OC fanfiction is 'A New Bond'. It beautifully weaves a story of an original character interacting with Marcus in the harsh world of the Gears of War setting. The OC in this story has a unique backstory that ties in well with Marcus's journey.
Emperor of Chaos was a fantasy novel written by Ye Dadao and the stone house. The novel told the story of the protagonist, Xiao Yun, who constantly broke through his cultivation base and finally became the Chaotic Emperor through enlightenment of the Chaotic Body's ability. In the novel, Xiao Yun could solve all kinds of problems through enlightenment, including difficulties in cultivation and combat. However, the specific plot and story development could only be understood by reading novels.