One character that might be in 'Naruto' baby daddy fanfics is Karin. She has had interactions with Naruto in the series. Although their relationship was not of a romantic nature in the original, fanfic writers can take creative liberties. They can create a story where Karin and Naruto have a relationship that leads to a baby. Also, there could be original characters created just for the fanfic that become the mother or have some other important role in the story about Naruto being a baby daddy.
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.
One popular 'Naruto' baby daddy fanfic might be the ones where Naruto discovers he has a child unexpectedly. For example, some fanfics could revolve around a situation where Naruto has been away on a long mission and comes back to find out he has a baby. Another type could be where he has a relationship with a female character, and they have a child together in the fan - created storyline.
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.
One possible character could be Jiraiya. He was Naruto's mentor later in life, but in a fanfiction, he could have taken Naruto as a baby. He had a close relationship with Naruto's father, so it would make sense for him to take Naruto under his wing from the start. Another could be Tsunade. As one of the Sannin, she has the power and the means to protect Naruto. Plus, she might have seen it as her duty to take care of the son of her old teammate.
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.
The most common character is Gaara as it's his story of being a baby daddy. The mother of the baby is another crucial character. Depending on the plot, other characters from the Naruto world could be included. Shikamaru, being one of Gaara's acquaintances, could show up to offer his strategic advice on how to handle fatherhood. Kankuro and Temari, his siblings, might also be there to provide family support or add some family - related drama to the story. And the baby, which is at the heart of the 'baby daddy' concept, would be a central element in the interactions of all these characters.
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.
Ben and Josh are the central figures. Ben could be portrayed as the more impulsive of the two. He might make hasty decisions that often get them into funny or tricky situations. Josh is probably the one who tries to keep things in order. He's the one who thinks about the consequences and tries to guide Ben in a more responsible direction. Their relationship is what drives the fanfiction forward.
Riley and Danny are the main characters. Riley might be a character with a mysterious past that slowly unfolds throughout the story. Danny may have a strong family background that influences his actions towards the baby. And the mother of the baby is also a crucial character as her relationship with both Riley and Danny drives the story forward.