Well, in this kind of fanfiction, it might explore the unique relationships. The main character having three vampire wives could lead to a lot of interesting scenarios. There could be elements of a supernatural family dynamic, like how they deal with their vampiric nature in a domestic setting. Maybe they hunt together or protect their territory as a family unit.
The idea of having three vampire wives is really cool. It's not your everyday relationship story. The vampire aspect adds an element of mystery and danger. Just think about all the things that could happen with vampires involved, like their special powers and their need for blood.
To seduce a vampire in manga, you could try being mysterious and alluring. Maybe have a unique style or personality that catches their attention. Also, showing bravery in the face of danger could make you stand out to them.
The ending of the Vampire Knight was more complicated because it had changed and deepened many times between the manga and the novel. Here are some possible endings:
At the end of the manga, Yuki became the vampire hunter D and Zero became the knight who guarded her. In the battle with the vampires, Jiu Lanshu and the Pivot Party finally defeated the vampires and finally got together with Youji. However, due to the disappearance of Vampire Hunter D, Zero had no choice but to continue searching for other Vampire Hunters to protect humans.
At the end of the novel, Zero became the new vampire hunter and continued to protect humans. In the battle with the vampires, Zero and Youji finally got together and Jiu Lanshu became Zero's ally again. However, in the novel, the fight between the Central Party and the vampires did not end completely. New threats continued to emerge.
Different versions may have different endings, but in general, the vampire knight is a work of depth and complexity. Its ending may make people feel regretful or gratified.