The main character could be a female vampire from the Twilight world who is intrigued by the mafia family's sense of loyalty and family bonds. She decides to infiltrate the family to understand them better. On the mafia side, the main character could be the family's enforcer, a tough and no - nonsense guy who at first wants to get rid of the vampire but then starts to respect and even care for her as he gets to know her more.
One of the main characters might be an old - school mafia capo who has seen it all but is completely baffled when he comes across the Twilight creatures. He has to figure out how to deal with them while still maintaining the power and reputation of the mafia family. And then there could be a Twilight werewolf who becomes involved, acting as a sort of mediator between the mafia and the vampires, as he has his own reasons for not wanting all - out war between the two groups.
A main character could be a young and ambitious member of the mafia family, like a son or daughter of the don. They could be the one who first encounters a Twilight vampire and their life takes a new turn. Another main character could be the vampire itself, perhaps a rogue vampire who doesn't follow the normal vampire rules in the Twilight world.
One possible plot could be a vampire from the Twilight universe getting involved with a mafia family. Maybe the vampire is initially seen as a threat by the mafia but then they realize they can use the vampire's powers to their advantage. For example, the vampire's super strength and speed could be used in heists or for protection against rival mafia groups.
In 'doomsday mafia twilight fanfic', the main characters could be a mix. From Twilight, we might see characters such as Carlisle, given his leadership role in the vampire coven, being involved. On the mafia side, there could be a young and ambitious mafia member who is trying to make a name for himself during the doomsday. These two types of characters from different worlds would then interact and drive the story forward.
The mafia bosses are often very interesting. They usually have a strong presence and a complex personality. They're in charge of everything and have to make tough decisions. Also, the characters who are caught between the mafia world and the normal world, like a human who falls in love with a mafia vampire. They have to navigate two very different worlds.
Since I haven't read it, I can't say for sure. But likely the mafia man himself is a main character. There might also be his friends or allies within the mafia, and perhaps a love interest who is an outsider or has some connection to the mafia world in a different way.
There could be a young unicorn named Starlight. He might be a brilliant but overconfident student who Twilight has to guide. Another character could be a pegasus named Rainbow, who is always getting into trouble and Twilight has to keep in line.
Obviously, Harry Potter himself would be the central character. But there could be a mafia boss who takes him in, maybe someone with a lot of power in the wizarding underworld. And there might be some henchmen characters who act as Harry's guardians or trainers in this new, dark world.
Well, Harry Potter is a given. Then there could be a female mafia boss, a strong - willed woman named Sofia. She sees Harry as a son figure. Her right - hand man, Rico, could also be an important character. In the wizarding world, Sirius Black could find out about Harry's situation and try to rescue him. And of course, Voldemort would still be the main villain in the background, as his actions would still be relevant to Harry's story even in this unique fanfiction scenario.
Another possibility is that the fanfiction focuses on the Volturi. There could be a story about one of the Volturi members and a new character, or even a different take on the relationships among the Volturi themselves that is the'sweet thing' in this piece of fanfiction.
Perhaps there is a new vampire character whose origin story is connected to the etching on their skin. This character could be the central focus, with their interactions with the known Twilight characters driving the story. They might be in conflict with some of the traditional vampire clans because of their unique marking.
I don't have enough information to say for sure. But in a mafia - life novel, there would probably be a tough and ambitious protagonist. There might also be an older, wiser mafia boss who acts as a mentor or antagonist. And there could be a love interest character as well.