Well, there might be an old vampire named Victor. Victor has seen many vampires come and go and he takes Mankae under his wing to teach him the ways of the vampire world. Then there's Mia, a witch who has a history with Victor. She senses Mankae's change and offers her help, but she also has her own motives which may or may not be in line with Mankae's survival and well - being.
Well, the plot could involve Mankae being bitten by a vampire. Then he starts to struggle with his newfound vampiric nature. He might have to hide it from his friends and family at first. Maybe he has a love interest who is human, and he's afraid of hurting them. He could also be hunted by vampire hunters who sense that he's a new vampire and see him as an easy target.
One common theme is the struggle between the two different natures. The mankae's nature and the vampire's nature often clash or complement each other. Another theme is the search for identity. The characters are trying to figure out who they are in this strange combination of mankae and vampire - influenced world.
It could be a jealous rival. This rival might be envious of mankae's popularity or achievements. So, they set him up to get arrested by providing false information to the police. They want to see mankae's downfall and think that getting him arrested is the best way to achieve this.
Well, 'Mystic Bond between Mankae and Vampire' is a great one too. The story focuses on the special bond that forms between the mankae and the vampire. It's not just about the typical vampire stuff like blood and fangs. It shows how their relationship develops over time, with elements of adventure and self - discovery.
One possible plot could be that mankae is wrongly accused of a crime. Maybe he was at the wrong place at the wrong time. For example, he was near a store that got robbed and due to some misunderstandings, the police think he was involved. So he gets arrested and has to prove his innocence throughout the fanfiction.
Tomoyo would also be an important character. She would be very worried about Sakura. She might use her skills in making costumes to create some special baby clothes for Sakura. And she would be constantly by Sakura's side, taking care of her and trying to comfort her.
His friends Orihime and Chad would probably be main characters. Orihime could be very motherly towards baby Ichigo, always making sure he's comfortable. Chad would be the strong protector, making sure no harm comes to the baby.
Edward is almost always there. Since he's such a central figure in Bella's life as a human and vampire in the original story, he would likely play a big role in the fanfiction too. He might be the one guiding Bella through her new vampire life.
Besides Yui, there could be a group of young vampires who take Yui under their wing. They could be fun - loving and introduce Yui to the vampire nightlife. Then there might be an older vampire mentor figure who tries to guide Yui in controlling her powers. And a human love interest from Yui's past who still has feelings for her and tries to bring her back to the human side.
It might include a vampire hunter who is on Jeremy's trail. Also, Jeremy's family members could be important characters as he tries to protect them from the vampire world he has now become a part of.