Edward would be completely devastated. He would likely go into a blind rage and seek out whoever was responsible for Bella's death. His love for her was so intense that he would stop at nothing to avenge her.
Edward would be consumed with grief and guilt. He might blame himself for not being there to protect Bella. He would then use all his vampire powers and resources to track down the perpetrator. He would be relentless in his pursuit, and his anger would be a terrifying force. His family would probably have to hold him back from doing something rash at first, but eventually they would join him in seeking justice for Bella. He would also be in a state of deep emotional turmoil, constantly replaying his memories of Bella and wishing he could have changed the outcome.
Bella might go into a deep depression. She was so in love with Edward, and his death could shatter her world. She could become withdrawn and isolate herself from her friends and family.
Edward would likely be in a state of panic. He loves Bella deeply, so he'd probably do everything in his power to save her. He might search for a cure or a way to reverse whatever is causing her to die.
There are other fans who are interested in exploring different storylines. They see it as a creative way to expand the Twilight universe. They might enjoy seeing how the characters would react in such a difficult situation, even if it's not in line with the original story.
Perhaps in the fanfiction, there's a misunderstanding within the werewolf pack. Some members believe Bella is a threat to their territory or secrets. They attack her without fully understanding the situation, and unfortunately, she is beaten to death. This could lead to a huge rift between the vampires and the werewolves, as Edward and his family would seek justice for Bella.
She might be devastated. Bella was deeply in love with Edward, so his leaving would be a huge blow. She could cry for days and feel like her world has ended.
Together, they would likely try to make Renesmee understand that their relationship is special and that her presence is also special. They might give her a hug or some form of affectionate gesture to show that they are a family unit and that her walking in is just a normal part of family life, even if it was an intrusion on their private time.
There's also 'The Redemption of Edward Cullen'. This fanfiction explores Edward's past in more detail and how it affects his relationship with Bella. It adds new layers to his character and gives a fresh perspective on their love story.
One great fanfiction could be where Edward and Bella's relationship is explored more deeply in a different vampire society setting. For example, they might be in a vampire clan that has unique rules about human - vampire relationships.
One interesting aspect could be how their relationship dynamics change. In the original, Edward was the vampire and Bella was the human, so reversing their roles might lead to a different power dynamic. For example, Bella as a vampire would have more physical strength and speed, which could make her more protective of Edward. Also, Edward as a human might struggle with his mortality compared to Bella's immortality, creating new tensions and storylines in the fanfiction.
In many Twilight fanfictions, Edward and Bella's kiss is often depicted as an extremely passionate and intense moment. Some fanfictions might explore different scenarios around this kiss. For example, it could be set in an alternate universe where they meet under different circumstances before the kiss. The kiss in fanfiction can also be used to show a deeper connection between them than what was shown in the original books. It allows the writers to play with the emotions and the relationship dynamics in a more creative way.