It depends on the specific fanfiction. But it could be the main characters from the Twilight series like Bella, Edward, and Jacob. If it's about a vampire losing control, Edward might be a central character. Since he's a vampire, he constantly has to fight his natural instincts. If it's more about a werewolf - related 'losing control' situation, Jacob would be a likely main character.
Often, in fanfictions related to Twilight, characters like Alice might be involved in a 'losing control' scenario. Alice has the power of seeing the future, and if she were to lose control of that power, it could lead to a very interesting story. Also, Carlisle, as the moral compass of the Cullen family, if he were to lose control in some way, it would be a significant plot point. So he could be one of the main characters in such a fanfiction.
A 'losing control' Twilight fanfiction could center around a character's struggle with newfound powers. For example, if a human in the Twilight world was turned into a vampire and had difficulty adjusting to their enhanced strength and speed, they might be losing control. It could also explore the chaos that ensues when a character loses control of their relationships, like Bella losing control of her relationship with Edward or Jacob.
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.
There might be a young and rebellious wolf in the pack who challenges the traditional ways. This character can bring a lot of drama and new ideas to the story, as they constantly butt heads with the more conservative members of the Twilight Pack.