Love and family are also very common themes. Itachi may have been a cold - blooded ninja before, but as a baby daddy, he discovers the warmth of love and the importance of family. There's also the theme of secrecy. Given his situation, he has to keep the existence of his child a secret from many people, which adds a lot of tension to the story.
The theme of growth is prevalent too. Itachi grows as a person. He goes from being solely focused on his ninja duties and the secrets he held to being fully committed to the well - being of his child. This transformation is often explored in great detail in these fanfictions, showing how fatherhood can change a person completely.
A common theme is protection. Itachi is often depicted as protecting baby Sasuke from various threats. Another theme is brotherly love. It shows their bond even when Sasuke is just a baby. Growth is also a theme, as we can see how Sasuke might grow up under Itachi's influence in the fanfiction.
One common theme is the shock of discovery. The wrestler suddenly finds out they're a baby daddy, which throws their life into chaos. Another theme is responsibility. They have to figure out how to be a good father while still being a WWE star.
One common theme is responsibility. The Akatsuki members, who are usually seen as tough and somewhat aloof, suddenly have to face the huge responsibility of being a father.
One common theme is redemption. Vergil, as a baby daddy, often has to make up for his past actions and become a better person for his child. Another theme is the struggle between his old life of fighting and his new role as a father.
The theme of family is also prevalent. Even though they may not be related by blood, they form a family - like bond. Derek acts as a father figure, guiding and supporting Stiles. There's also the theme of loyalty. They stay loyal to each other through thick and thin in these fanfictions.
Family is a common theme. It could be about how Ben and Joshua deal with the situation of having a baby together or separately. Another theme might be love, like romantic love between them or with other characters in the story.
One common theme is the journey of self - discovery. Danny might be on a path to discover what kind of a father he can be, and Riley could be on her own journey of realizing her role in this new family - like situation. Another theme could be friendship. They start as friends, and the fanfiction might explore how that friendship is tested and strengthened by the addition of a baby. Love is also a theme, whether it's the love for the baby or a developing romantic love between Danny and Riley.
Family dynamics is also a big theme. How does Sam react to being an uncle? How does Castiel fit into this new family situation? And of course, how does Dean interact with the mother of the baby, if she's in the picture? These are all aspects of family dynamics that are explored.
One common theme is family. Since Danny is a 'baby daddy', many fanfictions explore how he builds and manages his new family unit. Another theme is love. Whether it's his love for his baby or his romantic relationships.
One common theme is protection. Blaine often takes on a protective role over Kurt, like a father figure. For example, in many stories he'll stand up for Kurt against bullies or difficult situations.