Since we don't know which specific 'first serial killer story' is being referred to, it's impossible to say for sure who the main character is.
A serial killer went on a first date. He picked a park as the meeting place. He was polite, opening doors and complimenting his date. However, during their walk, he would casually mention things like how easy it would be to disappear in the thick bushes. His date didn't quite catch on at first. As the sun set, he suggested they go for a drive, but she declined, sensing something off. That was her lucky escape.
The 'first serial killer story' could be about many things. It might be about the first known case of a serial killer in history. Maybe it involves details like who the killer was, where they operated, and what their motives were.
Since I don't know the specific 'star killer story', I can't say for sure who the main character is. It could be someone named 'Star Killer' if that's the title of a character in the story.
The main character in the 'Killer Sally' true story is Sally McNeil.
Given the lack of information about 'a 12 days of fiction killer story', it's really tough to determine the main character. It could be that the story is told from multiple perspectives, and there isn't really a single main character. However, if it follows a more traditional narrative, it's likely either the killer, whose actions drive the story, or the person who is trying to stop the killer, like a police officer or a vigilant citizen. But this is all just speculation at this point.
The main character is Jeff. He is a deranged and extremely dangerous killer.
The main character is Sally McNeil. A bodybuilder, Sally's life took a dark turn. Her actions and the events surrounding her became the focus of the 'Killer Sally' real story.
The title 'unscythe killer of kings story' strongly implies that the main character is Unscythe. This character is likely to be at the center of the narrative. They are probably a complex figure with a backstory that led them to become the 'killer of kings'. It could be that Unscythe has some personal vendetta against the kings, or perhaps they are acting on behalf of a greater cause. Without knowing the full story, we can only assume that Unscythe is the key figure around which the story revolves.
The main character in the 'killer of kings short story' might be a person who has been shaped by a tragic past. Maybe he was once a loyal subject to a king but was betrayed. This led him to become the 'killer of kings'. He would likely be highly skilled in combat, stealth, and strategy. He might also have some unique traits that set him apart from other assassins, like a special weapon or a particular code of ethics that he follows even in his line of work.
It's hard to say exactly without knowing which true story you're referring to. Different true crime cases have different serial killers. Some are infamous, like Ted Bundy, while others might be less familiar to the general public.