There's also 'Fate's Entwined Threads' which is quite good. It shows how their relationship might develop over time, with interesting character interactions and a plot that keeps you hooked. The author does a great job of staying true to the characters' personalities from the original work.
The 'owari no seraph' universe itself is quite dark and filled with complex lore. Fanfics about Krul and Mika allow fans to explore different aspects of this universe that may not be fully explored in the original work. It's also about the way they interact, with Krul often being in a position of power and Mika having to navigate that relationship while also dealing with his own issues.
A plot idea could be that Mika discovers a secret about Krul's past that changes his perception of her completely. This could lead to him trying to protect her from those who would use the secret against her.
One possible fanfic could be about Mika and Krul forming an unexpected alliance. Maybe they have to work together to face a common enemy that threatens both of their existences. In this story, Mika might start to see Krul in a different light, not just as a vampire but as someone with her own motives and desires.
The theme of redemption can also be found. Maybe Krul has made some mistakes in her past, and Naruto, with his belief in the good in people, helps her to find a path of redemption. Or vice versa, Naruto has his own inner demons that Krul helps him to face. This creates a deeper and more complex story in the fanfiction.
One popular 'naruto and krul fanfiction' could be 'Naruto and Krul's Unlikely Alliance'. In this fanfic, Naruto, with his unwavering determination, meets Krul in a strange new world. Their different powers and personalities lead to some really interesting interactions as they team up to face a common enemy. It has a great plot that keeps you hooked from start to finish.
A fanfic that stands out is 'The Three - Voiced Ensemble'. This one delves deep into the relationships between Rin, Len, and Miku. It explores not only their musical collaborations but also their personal growth. The author does a great job of showing how they support each other, like when Miku gives advice to Rin on how to improve her high - notes, and Len encourages them both during a tough musical competition. It's a long and engaging fanfic that really captures the essence of these three characters.
It's possible. A successful 'X Hannibal' fanfic would need to have a compelling storyline, well-developed characters, and maybe some unexpected twists. If it manages to do all that, it could gain a lot of fans.
There's 'The Bond Among Them' which focuses on the unique relationships between Harry, Fred, and George. It shows how their different personalities interact and complement each other in the wizarding world. This fanfic is really good at exploring their emotional bonds.