I would recommend 'A New Beginning for Bella and Edward'. This fanfic takes their story in a different direction after the events in the original series. It shows how they handle new challenges together and the growth of their love in the face of those difficulties. There are some really beautiful and heart - warming moments in it.
They are popular because their relationship is so unique. Edward is Renesmee's father in a very unconventional vampire - half - vampire family dynamic. Writers like to explore this complex bond.
There might be a fanfiction where Renesmee has a special power that she discovers on her own, and Edward is both proud and a bit worried. For example, if she could communicate with animals in a unique way. This could lead to adventures as they try to understand and control this new power together.
The popularity of Bella Cullen and Edward Cullen fanfiction comes from the fact that fans were so in love with their relationship in the original books. People wanted to explore more of what could have been, or different scenarios for them.
One popular storyline could be Renesmee's coming - of - age in the vampire world with Edward as her protective father. She might face challenges in school among humans while hiding her true nature, and Edward would be there to guide her through it. Another could be a time - travel scenario where they go back to a significant moment in vampire history and have to deal with the consequences of changing something. There could also be a story where Renesmee discovers a new power and Edward helps her master it while facing opposition from other vampire clans who fear her power.
The Cullen family would likely support Rosalie in various ways. Carlisle, with his medical knowledge, would be constantly monitoring her health and that of the baby. Esme would probably be there to offer emotional support, being like a mother figure to Rosalie. The others, like Emmett, Rosalie's partner, would be her physical protectors.
Often, the fanfictions show Edward as a very protective father figure towards Renesmee. He is always there to keep her safe from any threats, whether it's from other vampires or from the human world. Bella, as Renesmee's mother, also plays an important role, and they are shown as a very close - knit family unit. The other Cullen family members are usually portrayed as supportive and loving towards Renesmee as well.
Her character could also develop emotionally. The relationship with Jacob might open up new feelings within her. She could learn about love, loyalty, and sacrifice. For example, she might sacrifice her own desires for the safety of Jacob or their families. This would show a growth in her selflessness and maturity.