The plot could revolve around her search for her father's true identity. She might find out that Kaien had a much more complex past than she thought. As she digs deeper, she uncovers secrets that not only change her view of her father but also the entire world of Vampire Knight. This discovery could lead her to make decisions that have far - reaching consequences for both vampires and hunters.
A possible plot could be that she is kidnapped by a group of rogue vampires. Kaien's friends and colleagues then have to rescue her. During her captivity, she learns a lot about the vampires' motives and desires, which makes her question her own beliefs. When she is finally rescued, she tries to convince the hunters to be more understanding of the vampires.
She could be a rebel. She might oppose the traditional ways of the vampire hunters or the vampires. For example, if she falls in love with a vampire when she is supposed to be a hunter, it would create a great conflict. This could lead to her being ostracized by her own group and having to find her own path.
Perhaps she is half - vampire herself. This would create a lot of internal conflict as she tries to balance her human side and her vampire instincts. She could also be in a love triangle with a vampire and a human, which would add a lot of drama to the story.
In a fanfiction, Kaien's daughter might be a key figure in bringing about a truce between the vampires and the vampire hunters. She could grow up with a deep understanding of both sides, having been exposed to the vampire world through her father's connection and the hunter world through her family's legacy. This would lead to her trying to bridge the gap between the two groups, facing many challenges along the way.
One possible story could be that Kaien Cross's daughter discovers she has unique powers in the world of Vampire Knight. She might struggle to fit in among the vampires and humans, while also trying to understand her father's past and his connection to the vampire world.
The plot could revolve around her discovery of her family's past. As she uncovers the secrets and the struggles her parents went through, she gains a new understanding of herself and her place in the world. For instance, she might find old diaries or hear stories from the elders that open her eyes to the sacrifices her parents made for the greater good.
One possible plot could be that the vampires from Vampire Knight are suddenly transported to the real world. They would have to deal with modern technology and society while trying to hide their true nature. For example, they might struggle with using cell phones or getting around in cars. And they would have to be extra careful not to expose their fangs or their need for blood in public.
The plot could be about the child trying to bring about peace between vampires and humans. Using its special connection to both worlds, it could strive to end the long - standing feud. It would face many difficulties along the way, like distrust from both sides, but with determination and the legacy of its parents, it could make a difference.
In Vampire Knight fanfiction, Rido's daughter could play a villainous role. Since Rido was a rather malevolent character, she might follow in his footsteps and cause chaos among the vampires and humans. She could be seeking revenge for her father's death or trying to fulfill his unaccomplished plans of domination.
Perhaps there's a prophecy that foretells of Kaname and Zero's union resulting in something extraordinary, like the Mpreg. They initially resist it, as it goes against their nature and what they know. But as time passes, they start to see the potential in this new situation and work together to bring about a new era in the Vampire Knight universe, one that is more inclusive of their unique relationship.
One possible plot could be that the OC is a new student at Cross Academy. Rido senses something special about her. He starts to follow her secretly, intrigued by her unique aura. As the story progresses, the OC discovers Rido's true nature but instead of being afraid, she is drawn to him in a strange way. Their relationship develops as they face various challenges together, like the conflicts between vampires and humans at the academy.
A story could be about Rima and Shiki exploring an ancient vampire tomb. There, they find clues about their vampire lineage that they didn't know before. This discovery could change their relationship as they realize they are more connected than they thought.