Well, obviously Lance is a main character as he is the one being kidnapped. His friends, like Keith, Hunk, and Pidge, are often involved. They usually play the roles of the rescuers, using their unique skills to try and save Lance.
Often, the fanfictions might introduce new characters who are related to the kidnapper or have some knowledge about the situation. These new characters can add more depth and complexity to the story, and they interact with the main characters in different ways as the plot unfolds.
In some fanfictions, there could be a mysterious kidnapper as a main character. This character could have a complex backstory that led them to kidnap Daphne. It could be someone with a grudge against her or her friends, or perhaps someone seeking a ransom. And sometimes, there might be other characters from the same universe who get pulled into the situation, like the local police or a detective who teams up with Daphne's friends to solve the case.
Harry Potter himself is the key character in 'Harry is burned' fanfictions. But other characters like the Weasley family as a whole can be involved. Mrs. Weasley might take on a motherly role towards Harry, trying to nurse him back to health. And Fred and George could use their magical inventions to try and ease Harry's pain or discomfort from the burns.
Obviously, Kushina herself is the central character. But often, Minato, her husband, is also involved. Since they are closely related, his actions and reactions to Kushina's time - traveling situation are important parts of the story. Naruto can also be a key character. If Kushina travels to a time when Naruto is already born or in the future, their interactions can be very emotional and drive the plot forward.
Well, obviously Draco Malfoy himself. Often, characters like Harry Potter, Hermione Granger, and Ron Weasley are involved too. Since they are the main protagonists in the original series, in fanfictions about Draco's arrest, they might play roles as witnesses, or even as his defenders or accusers depending on the plot.
Obviously, Lance is a main character. He could be an alien with unique physical features like glowing eyes or tentacles. Another common character might be a human who acts as Lance's guide on Earth or in a new environment.
Obviously, Naruto is the central character. His relationship with the Nine - Tailed Fox is the core of this kind of fanfiction. The Fox itself, which is a powerful and mysterious entity within Naruto's body, is also a key character.
The Joker is often involved. He loves to push Batman to the brink of death in many fanfictions. His chaotic and unpredictable nature means he could come up with all sorts of devious plans to almost kill Batman, like luring him into a death - trap filled with his signature laughing gas. Another character is Ra's al Ghul. Since he has his own goals for Gotham and sees Batman as an obstacle at times, he might try to eliminate him in a more elaborate and long - planned way that leaves Batman on the verge of death.
There's a fanfiction titled 'Lance's Ordeal'. In this, the kidnapper has a complex backstory that is gradually revealed as the story progresses. The author does a great job of building suspense around Lance's situation and how he might escape.
Often, the main characters also include the family members of the kidnapped person. If it's an original character, the writer might create a family for them. Their family could be searching for them, and this could add another layer of drama to the story. Maybe the kidnapped character's sister or brother has some special abilities that they use to try and find their kidnapped sibling.
Often, the other members of the Young Justice team are involved. Artemis is frequently included. She might be the one trying to rescue Wally or be involved in the events that led to his being trapped. Robin also shows up a lot. He could be using his detective skills to figure out how to free Wally.