One interesting Detective Conan kidnapped fanfiction could be where Conan is kidnapped by a new, mysterious criminal organization. In this story, the kidnappers might be after his knowledge of the Black Organization. They could try to force him to reveal secrets, and Conan has to use his wits to escape while still in his shrunken form.
Another idea for a Detective Conan kidnapped fanfiction is if Professor Agasa is kidnapped. Since he is the one who provides Conan with a lot of his gadgets, the kidnappers could be trying to get their hands on his inventions. Conan then has to figure out who the kidnappers are and what they want while also ensuring that the Professor's secrets don't fall into the wrong hands.
One great Detective Conan x Ran fanfiction is 'A New Adventure for Conan and Ran'. It shows a different side of their relationship during a mystery in an old castle. Another one could be 'Ran's Discovery' which delves into how Ran might find out Conan's true identity in a really unique way. There's also 'Conan and Ran: A Future Together' that speculates on their future relationship after Conan reveals his identity.
Conan would be extremely determined. He'd immediately start investigating. His first reaction would be to figure out who could have a motive to kidnap Ran. He'd think about any enemies he has made as Shinichi, since they might target Ran to get to him.
Often, Conan might get injured while trying to infiltrate a dangerous place alone. His injury could expose his identity if he's not careful. This would lead to a whole new set of problems as he has to deal with the injury, keep his identity a secret, and still solve the case. It's a very tense situation that makes for an interesting fanfiction plot.
Well, there might be a 'Sanji kidnapped' fanfiction where he is kidnapped by a group of bounty hunters who mistake him for someone else. In this story, his crew has to embark on a wild adventure to find and rescue him. They face many challenges along the way, like dealing with other pirates who are also after the bounty on the supposed 'target'. It could be full of action and humor as the Straw Hats try to outwit everyone to get Sanji back.
One interesting Renesmee kidnapped fanfiction could be where the Cullens have to use all their vampire powers and alliances to track her down. It might involve a new vampire clan that has some grudge against the Cullens and decides to take Renesmee as a way to get back at them.
One popular 'Zelda kidnapped' fanfiction might involve Link going on a heroic quest to rescue her. He could face various challenges like dangerous monsters and complex puzzles along the way. Maybe in the fanfiction, Zelda has been kidnapped by a powerful dark sorcerer who wants to use her for some evil plan, like draining her magic powers.
A 'Undertale kidnapped' fanfiction could also involve Frisk being kidnapped by a group of rogue monsters. These monsters might be angry at humans for sealing them underground and plan to use Frisk as a bargaining chip to negotiate their freedom to the surface. This would create a tense situation as the other friendly monsters would have to decide whether to side with the rogues or help Frisk escape.
There could be a fanfiction where Naruto is kidnapped during a mission. In this case, the story could explore how his ninja skills and his strong will help him survive while captive. It might also show the internal struggle of the kidnappers, some of whom may start to question their actions after getting to know Naruto better.
In some fanfictions, Kakashi could be kidnapped by a group of rogue ninjas who are after his Sharingan. They might think that by taking him, they can extract the power of the Sharingan for themselves. There could also be a fanfic where he's kidnapped as part of a plan to draw out Naruto and the other Konoha ninjas, to ambush them when they come to rescue Kakashi.
If it's a well - written fanfiction, there could be some unexpected twists. Maybe the kidnapper is someone Ran knows, like an old acquaintance with a grudge. Or perhaps there are multiple kidnappers with different goals. Conan would not only have to deal with finding Ran but also with any traps or false leads set by the kidnappers. And Ran, being a strong - willed character, might try to escape on her own, leaving behind some clues for Conan to find.