Another theme is growth. Naruto grows as a person and as a father. He learns new things about himself and about parenting. He might start out not knowing how to make a proper meal for his child but by the end of the fic, he's a master chef for his little one. There's also the theme of protection. Naruto will do anything to protect his child from harm, whether it's from other ninjas or just normal everyday dangers in the village.
I've heard of a 'Naruto single father fanfic' where Naruto's child has some special abilities. Naruto, as a single father, has to figure out how to help his child control these powers while also dealing with the normal parenting stuff. It shows a more vulnerable side of Naruto that we don't often see in the original series.
One common theme is the struggle of balancing ninja duties and fatherhood. Naruto has to be out there protecting the village but also be there for his child.
Another theme is the struggle with his past. Anakin has a lot of baggage from his time as Vader. In these fanfics, as a single father, he often has to come to terms with that past and figure out how it will affect his child - rearing. For example, he might worry about passing on his dark tendencies. It's a complex exploration of his character.
One possible storyline could be Naruto struggling to balance his ninja duties with raising his child alone. Maybe he has to take the kid on missions sometimes, teaching the little one about the ninja world along the way. Another could be Naruto dealing with the judgment of the village as a single father, showing how he overcomes that and still raises a strong and kind - hearted child.
There might be a fanfiction where Naruto becomes a single father because of some unforeseen circumstances during a mission. He then has to teach his child the ways of the ninja world while dealing with his own emotional turmoil. This could explore how Naruto's past experiences shape his parenting style.
One common theme is the struggle of single parenting. Naruto has to handle all the responsibilities of raising a child alone, like providing for them, protecting them, and teaching them right from wrong. Another theme is the clash of different worlds. Since it's a crossover, there are elements from different anime universes that Naruto has to deal with while raising his child.
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.
One great 'Anakin single father fanfic' is 'A Father's Redemption'. It delves deep into Anakin's struggle to raise his child alone after certain events in the Star Wars universe. The story shows his growth as a person and a father, and how he tries to shield his child from the dark side that once consumed him.
In single father fanfiction, Naruto's character often develops a new level of patience. He has to deal with his child's tantrums and needs, which is different from his ninja battles. This makes him more empathetic.