It could be Bella. She often finds herself in the middle of the vampire - werewolf drama in the original Twilight series. So in 'getting back to myself', she might be trying to find her true self again after all the chaos and changes she has been through. Maybe she wants to go back to the simple girl she was before getting involved with Edward and the vampire world.
Alice could also be the main character. She has a unique perspective in the Twilight world as a vampire with the ability to see the future. However, she may have lost sight of her own self in the process of serving the Cullen family and dealing with the various threats. In 'getting back to myself', she could be trying to break free from her predefined role and get back to the essence of who she really is.
Another possibility is Jacob. He has his own identity crisis in the Twilight story. In the fanfiction 'getting back to myself', he could be on a journey to find his true self, separate from his werewolf nature and his complex relationship with Bella. He might be trying to figure out who he really is without the influence of the pack and the ongoing feud with the vampires.
Well, one key element could be self - discovery. In Twilight fanfiction, the characters often have complex identities. So in 'getting back to myself', the protagonist might be trying to find their true self among the chaos of the Twilight world, perhaps separating from the influence of vampires or werewolves. Another element could be the struggle with the pre - existing storylines. Since Twilight has a set plot, the fanfiction may focus on how the character breaks free from the expected narrative to return to their true self.
It could be someone completely new. A character that the author creates to disrupt the status quo in the Twilight universe. This new character might have unique powers or abilities that change the course of the story.
It could be a new character, like a young girl who has just moved to Forks and discovers she has psychic powers. She then gets caught up in the existing drama of the twilight world.
It could be an ordinary person, like a college student. They are just going about their normal day when suddenly, they are turned into a gorilla. This would make for an interesting contrast between their normal life and the chaos that ensues when they become a gorilla.
Perhaps it could be a minor character from Twilight who somehow ends up in a situation where they are kidnapped by a creeper. This would give the writer a chance to explore that character more deeply and in a completely different context. For example, a character like Jessica from Twilight could be the main character. She's not a central figure in the original story, but in this fanfiction, she could have a whole new adventure.
It could be a new character entirely. Maybe a young vampire who was turned recently and is still adjusting to the 'alive inside' state of being undead. This character could struggle with the morality of being a vampire while also trying to fit into the Twilight world's complex social structure.
An old werewolf who has decided to retire from the pack life and goes on a trip to all the places that were important to the werewolves in the Twilight story. Along the way, they might run into some vampires and have to face old prejudices and form new alliances.
Edward Cullen could be a great main character. Since he is already a part of the Cullen family who loves baseball, he could be the one to hit a crucial home run. Maybe this home run is what saves Bella from some sort of danger during a baseball - related event. For example, the Volturi might be there to cause trouble during a game, and Edward's home run distracts them long enough for Bella to get to safety.
Another option could be Jacob. As a werewolf, he has a connection to the spiritual side of the Twilight world. He might be the one to discover the hauntings first and have to figure out how to deal with them, especially if they pose a threat to his pack or the people he cares about in Forks.
A new character could be introduced as the main character. This character could move to Forks and be unaware of the supernatural world there. Their arrival could trigger a series of events that force the existing Twilight characters to have a fresh start in how they deal with their secrets and relationships.