Well, Alec is obviously a main character. Often, his closest friends or family members are also key. For example, his sister might be there, trying to save him or being extremely worried about him.
There could also be the villains. Depending on the context of the fanfiction, it might be Dr. Eggman. He's always trying to cause trouble for Sonic and his friends, and he could be the one behind the situation where Tails almost dies. So Dr. Eggman would be a main character on the opposing side.
One popular 'Alec almost dies fanfic' might be the one where he gets caught in a dangerous magical trap. The author vividly describes his struggle for survival and the panic of those around him.
The main characters are Alec and Magnus. Alec is a Shadowhunter, and Magnus is a powerful warlock. They are the central focus of the fanfic set in the City of Glass.
Obviously, Alec and Magnus are the main characters. Alec is a Shadowhunter, known for his loyalty and his growth from a more reserved person to someone more open - minded. Magnus is a powerful warlock, flamboyant and full of magic and mystery.
The main characters are often the well - known Transformers from the 2007 movie, like Optimus Prime and Megatron. They are central to most of the stories as they are the leaders of their respective factions.
Often, there are characters who are sweet - lovers. Maybe a young girl or boy who has a special affinity for chocolate and is at the center of the story.
Sometimes, the main characters could be metro workers. For instance, a young metro driver who discovers something unusual during his shift. Or it could be a maintenance worker who stumbles upon a hidden part of the metro system while doing repairs. Another type of main character could be a street artist who uses the metro stations as their canvas and has a whole story related to their art and the metro environment.
Obviously, hachishakusama is often the central character. It's the main focus of the fanfic.
Since I don't know the specific fanfic, Sakura is likely one of the main characters as it's in the title. There may also be characters related to her, like her friends or family who are affected by her death in the wave.
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.