I'm not entirely sure as 'fanfic' can vary greatly. It could be about Harry Potter being kidnapped in some alternate storyline created by a fan. Maybe it's a dark plot where Voldemort or some new villain has abducted Harry for their own evil purposes.
You can try looking on some popular fanfic websites like Archive of Our Own (AO3). There are a lot of Harry Potter fanfics there, and you might be able to find ones related to this topic by using the search function.
Well, one possibility could be that a dark wizard other than Voldemort kidnaps Harry. Maybe this wizard wants to use Harry's magic for his own evil purposes. He could take Harry to a hidden lair and try to train him to be evil from a young age. However, the wizarding world soon realizes Harry is missing and Dumbledore leads a search party to rescue him.
A powerful and insane magical being from a far - off land. For example, a powerful sorcerer from a place like the Forbidden Forest that has long been in hiding. He hears of the prophecy about Harry Potter and decides to kidnap him as a baby to study his magic and use it to gain more control over his own territory.
One possible fanfiction could be that Harry Potter is kidnapped by a dark wizard who has some strange power that makes Harry squint. Maybe this wizard is trying to use Harry's unique connection to Voldemort for some dark ritual. Harry has to use his wits and the few spells he can manage while squinting to try and escape.
Not really. Fanfic writers usually create stories that are more in line with the positive image of Harry Styles. They might write about meeting him backstage, going on a date with him, or being friends with him. A 'Kidnapped by Harry Styles fanfic' goes against the norm as it involves a rather negative and dangerous situation, so it's not a common type.
In a certain 'Harry Potter kidnapped' fanfiction, Harry is abducted by a wizard who was once wronged by the wizarding world. However, as the story progresses, Harry manages to show the kidnapper the value of forgiveness and redemption. By the end, the kidnapper releases Harry and they both work towards making the wizarding world a better place, which is a very heartwarming and happy ending.
There is a fanfiction where Harry is kidnapped by a group of rogue Death Eaters who believe he holds the key to some dark magic. It's full of action as Harry uses his wits and some newly discovered magic to outsmart them. This fanfic often has elements of mystery and danger, making it an exciting read.
The Death Eaters are very likely kidnappers. Since they are Voldemort's followers, they might try to kidnap Harry to please their master or gain some advantage in the wizarding war. Another possibility is some power - hungry pure - blood wizards who see Harry as a threat to their status quo. They could kidnap him to keep him out of the way.
At the beginning, Harry would be frightened. He's in an unknown place with Loki, who is known for his trickery. But Harry is no pushover. He would quickly gather his courage. He would remember all the times he's faced danger at Hogwarts. He might try to communicate with Loki to understand his motives. If Loki reveals that he wants to use Harry's magic for something, Harry would try to find a way to outsmart Loki. He could pretend to cooperate while actually looking for a weakness in Loki's plan. Harry would also be thinking about his friends at Hogwarts and how he needs to get back to them, which would give him extra motivation to fight back against Loki.