It could be Alan Breck Stewart. He plays a significant role and shows bravery and determination throughout the story.
It's hard to say for sure. But some readers consider both Alan and David as heroes, as they each have their moments of courage and importance in driving the plot forward.
Maybe it's David Balfour. He is the protagonist who goes through many challenges and adventures in the novel.
Another option for the hero could be a mysterious figure who has a vendetta against imprijt. They see the kidnapping as an opportunity to finally take down imprijt. This figure could have special powers or abilities that give them an edge in the fight against imprijt to rescue the victim.
A young and determined trainer could be the hero. They have a strong bond with their Pokemon and when their Pokemon are kidnapped, they are furious and won't stop until they get them back.
It could be a group of villains working together. For example, the League of Villains might decide to kidnap Deku. They might want to use him as a bargaining chip against the heroes. Or it could be a rogue hero who has turned to the dark side. This hero might think that Deku is getting too much attention and kidnaps him to take his place in the spotlight.
Well, in a Deku kidnapped fanfiction, perhaps an anti - hero group kidnaps him. They might see Deku as a symbol of the hero system they oppose. They could hold him hostage to make demands on the hero society, like changes in how heroes are regulated. Or it could be a rival from his school days who is jealous of Deku's success and kidnaps him out of envy.
There's a possibility that the hero is a misfit or an outcast in society. This person has always been different and not fully accepted, but they possess unique qualities that make them the perfect candidate to be the hero the world needs. They might start off being underestimated, but as the story unfolds, they prove themselves to be the one who can change the world.
It could be a new character created specifically for the fanfiction. Maybe a young scientist who is working on a project related to the super - soldier serum. Since Bucky has a history with the serum, this would create an interesting dynamic.
It could be an old enemy of Keith's, someone from his past who has a vendetta against him. Maybe a former rival from his days in the military academy who has now turned to more devious means.
In some creative fanfiction, it could be an alternate version of Spiderman himself from a different dimension. This Spiderman has gone bad and kidnaps a fan from our dimension as part of some grand, dark plan that involves crossing dimensions and causing chaos.
A power - hungry nobleman from a neighboring land could be the kidnapper. He might believe that by having Rapunzel in his possession, he can gain some sort of political advantage or use her as a bargaining chip against her kingdom.
It could be Orochimaru. He's always been interested in obtaining powerful individuals for his experiments, and Naruko with her unique abilities would be a prime target.