Perhaps it's about Bella's transformation. Alice may have her own ideas about when and how Bella should be turned into a vampire. Bella, on the other hand, has her own desires and fears regarding the transformation. Their disagreements on this crucial aspect of Bella's life in the vampire world could result in a fight.
One possible reason could be a difference in their views on how to protect the Cullen family. Alice might be more focused on using her visions to predict threats and take preemptive actions, while Jasper, with his military background, could prefer a more direct and combative approach. This divergence in strategies might lead to a fight between them.
Alice would be the likely winner. She is fast, agile, and has had time to hone her fighting skills over the years. Bella, even if she has some natural strength as a vampire, is still relatively new to the vampire world and would lack the experience and finesse that Alice has. So in a straight - up physical fight, Alice would come out on top.
Perhaps it's related to their different views on the Dark Lord. Lucius is a more committed follower, while Draco may have doubts or be less eager to be involved in the dark deeds. Their conflicting loyalties could cause a rift and ultimately lead to a fight in the fanfiction.
Alice and Bella are likely characters from a particular fandom. They could be characters from a book series, movie franchise, or some other form of media that has a group of fans (gp stands for general public or group of fans). Without more context, it's hard to say exactly which fandom they belong to.
One characteristic is the exploration of their unique relationship. In many 'bella alice fanfiction', their friendship or sister - like bond is deepened and expanded. For example, they might share secrets or have adventures that only they can experience together.
In 'alice and bella fanfic', Alice is often depicted as very perceptive. She can foresee things, which gives her an edge in guiding Bella. Bella, on the other hand, is usually seen as brave. For example, in many fanfics, when they face danger together, Bella doesn't shy away. She stands her ground.
I'm not sure specifically what Alice's claim is without reading the particular Bella fanfiction. It could be anything from a claim about Bella's true nature, a claim regarding a relationship in the story, or a claim about some hidden power or secret.
A fanfiction could be about Bella and Alice becoming friends in a very different way. Since Bella is a werewolf, she has different instincts. Alice, being a vampire, initially struggles to understand her. But as they start to communicate more, they find common ground in their love for the forest around Forks. They start to protect it together from those who would harm it.
One great werewolf Bella and Alice fanfiction could be about their unexpected alliance. In this story, Bella, as a werewolf, discovers that Alice has a unique ability to see fragments of the werewolf future. They team up to protect the Forks from a new, powerful dark force. Their relationship is filled with initial mistrust but gradually evolves into a strong bond.
One possible fanfiction could be about Bella adjusting to her new vampire life while Alice, as a human, has to deal with the knowledge of the supernatural world in a different way. Maybe Bella tries to protect Alice from other vampires who might see her as a target because of her connection to Bella.