It could be an old flame that Bella had a brief relationship with. Maybe someone she met during a trip and then lost contact with until she found out she was pregnant.
Perhaps in this fanfiction, Bella had the kid in unexpected circumstances. She might be trying to keep the identity of the father a secret from the kid and the town. As the kid grows up, he or she starts to ask questions, and Bella has to decide whether to tell the truth or keep the secret, which adds a lot of drama to the story.
She would no doubt instill strong moral values in her child. Given her own experiences fighting against evil, she'd teach the kid to always stand up for what's right and to be kind to all magical beings. She might also teach the kid self - defense spells early on to protect themselves. For example, the Shield Charm and the Stunning Spell. And she'd make sure the kid understood when it was appropriate to use them. Also, Hermione would likely involve the kid in her research projects, sharing her passion for magical discovery with the next generation.
It's possible that the kid is a result of some sort of time - travel or alternate reality situation. Maybe the kid is actually Naruto from a different timeline or dimension, and Naruto has to figure out how to deal with this strange situation while on his training trip.
Well, the kid might go on a journey to discover a new spell that was lost in time. Just like Hermione was always into books and knowledge, her kid could be on a quest to find ancient magical texts hidden in a secret library in Hogwarts.
I'm not entirely sure if there is a specific 'Bella has anorexia' Twilight fanfiction. There are so many fanfictions out there that it's hard to keep track of all the different themes. But given the nature of fanfiction and how it allows for creative exploration, it's very possible that someone has written about this. It could be an interesting, if somewhat dark, take on Bella's character.
One popular 'bella has wings' fanfiction is 'Wings of Destiny'. It explores Bella's new life with wings in a magical world filled with mythical creatures. The story has great character development and an engaging plot.
Bella's best friend could play a crucial role. They could be the one who stays by her side throughout the process, providing emotional support, bringing her things she needs in the hospital, and even arguing with the hospital staff if they think Bella isn't getting the best care.
It could be her best friend. Her best friend might be the one who accidentally discovers Bella's secret in the fanfiction. And then they have to deal with the situation together, whether it's keeping the secret or helping Bella face whatever the secret entails.
The passing on of knowledge. Ash has a wealth of Pokemon - related knowledge, and in these fanfictions, he imparts that knowledge to his kid. It could be about different Pokemon types, how to catch them, or how to train them.