I think Anya Taylor - Joy would be an interesting choice for the girl. She has a unique look and acting style. The baby daddy? How about Henry Cavill. He could play the role of the somewhat troubled but attractive baby daddy. And for the 'God Girls', Florence Pugh could be one of them. She's a great actress and could create an interesting dynamic within the group. And perhaps Letitia Wright could also be part of the 'God Girls' as she has shown she can play strong and feisty characters.
For the girl, maybe Zendaya would be great. She has the acting chops to portray a strong - willed young woman in Rio. As for the baby daddy, I could see Oscar Isaac. He can bring that mysterious and charming quality that the role might require. And for the 'God Girls' group, actresses like Yalitza Aparicio and Lupita Nyong'o could be part of it. They are both very talented and could add a lot of depth to the group of friends.
Well, it could be that the baby daddy doesn't even know he's the father at first. The girl in the 'God Girls' decides not to tell him right away. She's worried about how he'll react and also about how it will affect her standing in the group. But as the baby grows, she starts to face more and more difficulties on her own, like financial problems. So she finally decides to reach out to the baby daddy. He, on the other hand, is shocked but then realizes he wants to be a part of the baby's life. This then sets off a series of events where they have to learn to co - parent and deal with their own feelings for each other in the midst of the Rio setting.
Obviously, Danny Phantom himself could be the 'baby daddy'. His dual nature as a human and a ghost could bring a lot of interesting twists to the story of having a baby. For instance, the baby might inherit some of his ghost powers, which would create all kinds of challenges for raising the child.
Iruka sensei is another possibility. He is kind and nurturing, having already shown his care for Naruto when he was a student. As a baby daddy, he would be patient and dedicated to raising his child with good values and a love for learning.
In Naruto fanfiction, characters like Jiraiya could also be a 'baby daddy'. He was known for his womanizing ways in the series, so it's not hard to fathom a situation where he has a child. Then there's Itachi. Although his life was full of tragedy and secrecy, a fanfiction could explore a scenario where he has a child before his untimely death. And Kiba could be a character as well. His close bond with his dog Akamaru and his brash personality could lead to a situation where he becomes a 'baby daddy' in a creative fanfiction.
Edward Cullen is one of the most common baby daddies in Twilight baby daddy fanfiction. Since he's the main male lead in the original series and has a complex relationship with Bella, it's natural that many fanfiction writers explore the idea of him as a father. Jacob Black is also a popular choice. His relationship with Bella was also significant, and in some fanfictions, he could end up being the baby daddy in an alternate storyline. Another character who might be the baby daddy in some fanfictions is Aro from the Volturi. His powerful and mysterious nature makes for an interesting take on being a father in the Twilight - inspired stories.
One popular trope is the 'enemies - to - lovers' between Rio and Beth. It adds a lot of tension and drama to the story. Another is Rio as the 'protector' in some way, even though he's a criminal. It gives an interesting twist to his character.
Family reactions are also a big theme. Their families' responses to the baby can range from excitement to disapproval, which adds a lot of drama to the stories. And often, there's the theme of secrecy or the need to protect the baby from the more dangerous aspects of their lives. For example, they might be worried about their criminal connections affecting the baby's safety.
The fanfiction could revolve around Ben getting injured and Riley taking care of him. During this time, Riley discovers a more vulnerable side of Ben that she hadn't seen before. Ben, in turn, realizes how much he appreciates Riley's presence in his life. This situation could lead to a romantic development between them. For example, one night when Ben has a fever, Riley stays up all night to take care of him. As he wakes up in the morning, seeing Riley asleep next to his bed, he feels a warmth in his heart that he hadn't felt before.
There could also be side characters like the baby daddy's friends or family members. His best friend might be trying to convince him to either step up or run away from his responsibilities. Or his mother could be a traditional figure who has very specific ideas about how he should handle the situation, adding more conflict to the story.
Typically, there is the human female character who becomes the mother. She might be an ordinary woman who suddenly finds herself in this extraordinary situation. Then there is the alien male character, the 'baby daddy'. He could be from a technologically advanced alien race or a more primitive one, depending on the story.