One plot idea could be that Mowgli is kidnapped by a group of poachers who mistake him for a rare forest spirit. They plan to sell him to a wealthy collector. Another could be that a rival wolf pack kidnaps Mowgli in an attempt to use him as a bargaining chip against his own pack. Maybe a group of outcast monkeys kidnap Mowgli to force him to teach them the ways of the man - village so they can gain power over the jungle.
A plot could involve a human cult that believes Mowgli has special powers due to his upbringing in the jungle. They kidnap him to perform strange rituals on him. Or perhaps a jealous jungle animal, who feels Mowgli has received too much attention, arranges for his kidnapping by a band of dholes. It could also be that an evil sorcerer kidnaps Mowgli to use his connection to the jungle for dark magic.
One idea could be Mowgli's adventures in a new part of the jungle he has never explored before. He might encounter a strange new animal species that teaches him a valuable lesson about life.
One plot idea could be that Todoroki is kidnapped by a villain who wants to use his powerful quirk for their own evil plans. His friends then embark on a dangerous rescue mission. Another could be that it was a case of mistaken identity and Todoroki has to figure out how to escape while also dealing with the kidnappers' demands. Or perhaps Todoroki is kidnapped by a group who wants to study his unique genetic makeup related to his quirk.
Another plot could be that Rapunzel is kidnapped by a mysterious figure from her past that she doesn't remember. As she's held captive, she starts to have flashbacks of her early childhood and discovers secrets about her family. Meanwhile, Flynn Rider and the others are on a frantic search for her, and Rapunzel has to find a way to signal them while also dealing with the revelations about her past.
Well, perhaps Katara is kidnapped by a bounty hunter who has been hired by someone who has a vendetta against the Avatar's team. The kidnapper could be taking her to a far - off and desolate location. Then, Aang and the others have to track her down through various difficult terrains. Or, it could be that she's kidnapped by a group of dark benders who want to study her waterbending to find a way to corrupt it. They might keep her in an underground lair filled with all sorts of dark magic - like contraptions.
One idea could be the protagonist discovers a hidden power within themselves while being held captive by the demons. This power could be the key to their escape or a way to turn the demons' own plans against them.
One plot idea could be that Sasuke kidnaps someone he believes has information about a hidden enemy. He then has to deal with the moral implications as he realizes the person is innocent. Another could be a love - driven kidnapping, where Sasuke kidnaps someone he secretly loves but is too conflicted to show it in a normal way. And perhaps a third idea is that Sasuke is forced to kidnap someone under a mind - control spell and has to fight against the control to free the victim.
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.