Typically, in a 'the walkers twilight fanfiction', we might see the protagonists from 'The Walkers' being thrust into the Twilight world. So, it could be characters like Rick or Michonne. Alongside them, the Twilight characters would also play significant roles. Bella might be involved in some sort of encounter with the Walkers, and Edward could be using his vampire abilities to deal with the new threat or situation that the Walkers bring to the Twilight universe.
Since I'm not familiar with a specific work named 'Sky Walkers A Love Story', I can't say for sure who the main characters are.
One interesting aspect could be the unique interpretations of the characters from 'The Walkers' within the Twilight universe. Maybe it gives a fresh take on their personalities and relationships. For example, how they might interact with the vampires and werewolves in the Twilight world.
The main characters are likely to be the ones from the original 'Twilight' like Bella, Edward, and Jacob. In fanfiction, they might be portrayed in different lights or with different personalities.
Typically, the main characters would include Bella, Edward, and the other members of the Cullen family. Since it's a Twilight - related fanfiction, they are likely to be central to the story. However, new characters might also be introduced, perhaps someone who is related to the Twilight Key in a special way, like a guardian or a seeker of the key.
Well, it could be a new vampire that the author has created. This vampire might be a loner, living in the shadows away from the main vampire clans in Twilight. Another could be a human character who stumbles upon this hidden vampire world.
There might also be an older, wiser character, like a mentor figure. This character could guide the younger protagonists, sharing their wisdom and experience about the strange happenings in Blackwater. Their insights could be crucial in solving the problems that the characters face in the fanfiction.
It's hard to say without reading it, but it could be Bella and Edward. Since it's Twilight fanfiction, they are often central characters. Maybe the vow involves their relationship, like a vow of eternal love or a vow to protect each other from new threats in the story.
Another type of main character in these fanfictions could be a human who becomes intertwined with Benjamin's life. This human might be in a dangerous situation that only Benjamin can save them from, or they could be someone who has an unexpected bond with Benjamin. This creates a lot of drama and interesting plotlines as the relationship between the human and Benjamin develops, often against the backdrop of the vampire - human relations in the Twilight world.
Obviously, Darkward is a main character. There might also be characters from the original Twilight series like Bella or Edward who interact with Darkward in unique ways in the fanfiction.
There could also be new characters introduced in the 'Fourteen Twilight Fanfiction'. These new characters might be other vampires or werewolves with their own unique powers and personalities. They could play important roles in either helping or hindering the main characters in their relationships or in dealing with the various challenges in the story.