In many Twilight fanfics, the father could be an original character created by the author to add a new twist to the story. Or, it could be a reimagining of an existing character with a different backstory and role.
One common theme is protection. The mother and father characters often try to protect their family from the threats in the Twilight world, like vampire attacks or getting involved in the werewolf - vampire feud. Another theme could be discovery. They might discover the secrets of the supernatural world their children are part of.
There's also the possibility that it's an unknown stallion from a far - off land. Twilight could have had an adventure in a different region and met someone there. This would add an element of mystery to the fanfic, as the readers would be curious to learn more about the father's background and how he and Twilight met.
The plot might also involve Jacob trying to keep his child safe from the ongoing feud between the werewolves and the vampires. He could be constantly worried about his child being caught in the crossfire. And as he tries to raise his child, he may also be dealing with his own feelings for Bella or other characters from the Twilight series in a new light.
Another option could be a completely new character created just for the fanfiction. This new character could be a powerful unicorn or an alicorn from a far - off land who met Twilight during one of her adventures and they fell in love.
If we look at the characters, in 'Twilight', Bella is a somewhat innocent and shy girl, while in '50 Shades of Grey', Anastasia is more complex in different ways. The male characters also vary greatly. Edward is a vampire with his own set of vampire - related issues, while Christian in '50 Shades' has his own set of psychological and relationship - related issues. And the overall plot in '50 Shades' is more centered around the power dynamics and sexual relationship which is not the case in 'Twilight'.
Well, it could be a really interesting fanfic. Maybe it explores how Jacob, as a single father, navigates his life in the world of Twilight. It might show his struggles in raising a child while also dealing with the supernatural elements that are so prevalent in the Twilight universe.
In one scenario, the father could be another werewolf from her pack. It could be a relationship that was kept secret, and the pregnancy now forces them to come forward and deal with the consequences.
Often, there could be a plot where Edward's child has some special ability or power, and he has to figure out how to help the child control it. And at the same time, there might be a love interest for Edward who has to accept both him and his role as a single father. Another plotline could be Edward trying to give his child a normal life despite the supernatural elements around them. He might enroll the child in a regular school and deal with the reactions of other humans when they start to notice something different about the family.