Since I don't know the story, I can't say for sure who the main characters are. They could be sailors if the blood knots are related to a nautical setting, or perhaps they are outdoor adventurers like hikers or climbers.
There's no way to tell without reading the 'blood knots short story'. But it's possible that the main characters are people who work with ropes in some way, like circus performers who use ropes for their acts and rely on strong knots like blood knots. Or it could be a group of friends who find an old rope with a blood knot and then their lives change as they try to figure out the story behind it.
I'm not sure specifically as there could be many stories with that title. It might be about some kind of situation involving blood knots, perhaps in a nautical context where blood knots are used to tie ropes, and the story could revolve around the significance or events related to those knots.
There's no way to know exactly without reading the 'blood games short story', but they might be a diverse group. Maybe there's a young hero who is trying to break free from the cycle of the games, and an antagonist who is in charge of organizing and running these brutal events. There could also be some side characters who are friends or foes of the main character, each with their own motives and backstories related to the games.
I don't know as I haven't read it. But they could be the martyrs themselves, or perhaps the people who were influenced by the martyrs.
I'm not sure as there's not enough information given. It could be two people in a feud or a group with internal conflicts.
Typically, the two 'blood brothers' are the main characters. We don't know their specific names yet as the title just gives the general concept of 'blood brothers short story'. But they are the focus of the story's events and relationships.
Since I haven't read the 'mending the knots fanfic', I don't know the main characters. But they are likely characters from the original work that the fanfic is based on.
The main character is Daniel Plainview, an oilman. And there is Eli Sunday, a preacher who has a significant role in the story. Also, Daniel's adopted son H.W. is an important character.
In the 'Blood In Blood Out' real story, one of the main characters is Miklo. He is a key figure in showing the journey through the gang life and prison experience.
Since I'm not familiar with the 'book of blood story', it's difficult to say exactly who the main characters are. But in a story with such a title, we might expect to find a character who is somehow related to the book of blood. It could be a researcher or an adventurer who stumbles upon this book and becomes involved in the strange events it contains. There might also be a villainous character who is trying to use the power of the book for their own evil purposes, or a victim who is caught up in the horror that unfolds because of the book.
I'm afraid I can't determine the main characters without more information. It could be that the main characters are heroes trying to stop the 'blood game' because they see it as immoral. Or they could be the ones who created the 'blood game' and are controlling it from behind the scenes.