I've also come across 'Female Yuu's Ascent'. This fanfiction portrays the female Yuu as a very strong and independent character. It starts with her facing challenges that are different from the male Yuu in the original story. As the story progresses, she forms alliances and overcomes obstacles in a way that is both exciting and fresh. The author has done a great job of building a new narrative around the female Yuu concept.
One great 'owari no seraph female yuu fanfiction' could be 'The Female Yuu's Adventure'. It explores a different side of Yuu's character as a female in the Owari no Seraph universe. It has some really interesting plot twists and great character development.
Love and friendship are also common themes. The female Yuu may form new friendships or fall in love in ways that are different from the male Yuu. These relationships can be a driving force in the story, either helping her grow as a character or presenting new challenges. Additionally, themes of survival in the harsh world of Owari no Seraph are present, with the female Yuu having to use her wits and strength to stay alive.
One interesting plot could be Yuu and Shinoa getting separated during a dangerous mission against the vampires. Yuu goes on a solo journey to find Shinoa, facing many challenges along the way. He has to battle powerful vampires and also deal with his own inner demons. When he finally finds Shinoa, they realize their bond has grown even stronger.
You can try fanfiction websites like Archive of Our Own (AO3). There are usually a lot of works related to Yuu and Shinoa from Owari no Seraph there. Just search for their names on the site.
In fanfiction, Yuu's character might be developed by showing his vulnerability more when it comes to Shinoa. For example, he could be more open about his fears and insecurities around her. Shinoa, on the other hand, could be developed by showing her softer side towards Yuu. She might let down her tough - girl facade and be more affectionate.
One popular theme is their relationship development. Fans often explore how their bond grows over time, from being comrades to something more. Another theme is adventure. Writers might create scenarios where Yuu and Shinoa go on special missions together, facing various challenges and enemies.
One popular Naruto and Owari no Seraph fanfiction could be 'Crossover of Worlds'. It often has interesting character interactions where Naruto characters meet those from Owari no Seraph in a unique plotline. Another one might be 'Alliance in the Shadows' which focuses on how the two groups from different universes form an alliance to face a common enemy. There are also some that explore the power dynamics when characters from both franchises exchange their abilities.
I think 'The Mysterious Oc' is a great 'owari no seraph oc fanfiction'. This fic creates an oc with a mysterious origin that gradually unfolds throughout the story. The oc's interactions with the known characters are well - written. Also, 'The Oc's Alliance' is worth reading. In it, the oc forms an unexpected alliance and together they face the challenges in the 'Owari no Seraph' universe. It has a lot of action and interesting character dynamics.
One possible plotline could be Yuu struggling with his new vampire nature while still trying to protect his friends. He might have to deal with the thirst for blood and resist the urge to harm his comrades. Another could be that he uses his new vampire abilities to fight against the real enemies of the series in a more powerful way. For example, he could use enhanced speed and strength to take on the vampires that are causing chaos in the world of Owari no Seraph.
There are often fanfiction communities on social media platforms like Tumblr. You can search for the 'owari no seraph guren x sayuri' tag there. Some fans might post their own fanfictions or recommend ones they've read. It's also a great place to interact with other fans who are interested in this pairing and might be able to point you towards some excellent fanfiction.
His relationship with Mika would be very different. Since Mika is already a vampire, they might have a new understanding of each other. However, there could also be some jealousy or power struggle as Yuu adjusts to his new vampire status. With his human friends, like Shinoa and the others, they might be initially afraid of him. But Yuu would probably try his best to show them that he's still the same person who wants to protect them.