She could be an original character created by the fanfiction writer. Maybe a new vampire or a human with a special connection to the Twilight world.
She could also be a completely new type of character that doesn't really fit into the traditional categories of the Twilight universe. Perhaps she's a magical being from a different dimension who somehow ends up in Forks and gets involved with the vampires and werewolves. Fanfiction allows for such wild and creative ideas.
It might be a reimagined version of an existing character from the Twilight series. For example, the writer could have taken Bella and given her a different backstory or personality in this fanfiction. There are countless possibilities as fanfiction often takes the basic elements of the original story and twists them in new and interesting ways.
She could be a long - lost relative of one of the Cullens. Maybe she was turned into a vampire long ago and has been living in isolation. The red umbrella is a memento from her human life, and now she's coming back into the Cullen family's orbit.
Edward Cullen could be one of the main characters. He could be the one who finds the girl when she wakes up and tries to protect her from the dangers of the Twilight world, like other vampires who might want to harm her.
Obviously, the father and the daughter would be the main characters. The father could be a human who is aware of the Twilight world and is trying to shield his daughter from its dangers. The daughter, on the other hand, might be a curious girl who is drawn to the supernatural elements of the Twilight world.
Edward would definitely be one of the main characters. His relationship with Bella, now a geisha, would be very interesting to explore. He might be both intrigued and a bit confused by this new side of her.
It might be that Bella, as a geisha, has a unique allure that attracts both Edward and Jacob in different ways. Her geisha training could give her an edge in understanding the hidden emotions and power dynamics among the characters in Twilight. For example, she could use her skills of perception and charm to deal with the Cullens' secrets and the Quileute tribe's traditions.
Well, it could be about a girl who hides under the bed perhaps to avoid some vampires or werewolves in the Twilight universe. Maybe she has some special power that she's trying to keep secret from the supernatural beings around her.
Perhaps she wakes up in a small town in Twilight. She soon discovers that she is being hunted by the Volturi because they think she has some special ability that could disrupt their order. She teams up with the Cullens to try and protect herself and figure out what's going on with her.
She could marry Flash Sentry. He has shown an interest in Twilight in some storylines, and their relationship could develop into a marriage. They could bond over their shared experiences in Canterlot.
She could marry Spike. They have a very special bond throughout the series. Spike has always been there for Twilight, and in fanfiction, this could develop into a romantic relationship leading to marriage. They already have a deep connection, and Spike's loyalty and Twilight's intelligence could make for a great couple.
Another possibility could be a new character created specifically for the fanfiction. This new character might have unique abilities or a personality that attracts Edward in ways Bella didn't. For example, she could be a vampire from a different coven with a very different view on life and love, which makes Edward question his feelings for Bella and consider this new character as a potential mate.