Another possibility is that a powerful witch, who has a vendetta against the vampires for some past incident, kidnaps one of the main characters from Twilight. She could use her magic to keep the vampires at bay while she tries to achieve her own goals, like getting a powerful vampire artifact.
One idea could be that a new vampire clan kidnaps Bella to use her as bait to lure Edward into a trap. They might want to challenge the Cullen family's power in the vampire world.
One plot idea could be that Twilight is kidnapped by a group of shadowy creatures who want to steal her magic for their own dark purposes. Her friends then embark on a quest to rescue her, facing various challenges along the way. Another could be that she's kidnapped by a jealous rival from another land who wants to prove their superiority. Twilight might have to use her wits and hidden powers to escape on her own while her friends are on their way.
One idea could be a story where the kidnapped kids form a strong bond among themselves in captivity and work together to outwit their captors. For example, they might use their unique skills like one being good at puzzles to unlock doors or another having a great sense of direction to find an escape route.
Well, one common plot twist could be that the kidnapper is actually a long - lost relative of Bella's with a hidden agenda. Another might be that the kidnapping was a set - up by a jealous vampire from another coven who wants Edward for themselves. And sometimes, it could turn out that Bella has some sort of hidden power that the kidnapper is trying to either use or suppress.
In some of these fanfictions, one plot could be that Bella's kidnapping is part of a scheme by a new vampire coven that wants to use her as bait to lure Edward. They might think that by having Bella, they can draw out Edward and his family and then overpower them to take over their territory.
One idea could be that the kidnapper has a mistaken identity and thought the miko was someone else with great power. Another could be that it's part of a larger scheme to disrupt the miko's religious order. Or perhaps the kidnapper has a personal vendetta against the miko's family and is using her as leverage.
Maybe the kidnapped person is actually a long - lost heir to a powerful kingdom, and the pirates plan to ransom them back to that kingdom. As the story progresses, the kidnapped character forms an unexpected bond with one of the pirates and they start to plot their escape together while also dealing with the politics of the ransom situation.
One idea could be that Izuku is kidnapped by a group who wants to use his knowledge of hero strategies against the heroes. They hold him hostage in an abandoned building. Another could be that a villain with a grudge against All Might kidnaps Izuku as a way to lure All Might into a trap. Maybe a group of anti - quirk fanatics take Izuku because they believe his powerful quirk is a threat to their cause.
Maybe the witches kidnapped the character because they believe the character is the key to a prophecy. The character could then try to find out more about this prophecy and use it to their advantage, like befriending some of the nicer witches to help them escape. This could involve a lot of exploration within the witches' lair, finding hidden passages and ancient scrolls that hold the secrets of the prophecy.
One idea could be that Serena is kidnapped by a mysterious group who wants to use her unique abilities (if she has any in the fanfic's universe) for their own gain. For example, if she's a great athlete, they might want to force her to compete for them illegally. Another plot could involve a jealous rival who kidnaps Serena to stop her from achieving a great success, like winning a big tournament. Or perhaps Serena is kidnapped by someone who mistakes her for someone else and the whole story is about her trying to convince them of their mistake while also trying to escape.
Maybe Mirajane is kidnapped by a dark wizard who has a vendetta against her family. In the fanfiction, the wizard could be trying to force Mirajane to reveal the secrets of her family's magic. Her Fairy Tail comrades would have to figure out where she is and how to defeat this powerful foe.