In these fanfictions, Sasuke often becomes more responsible. He was once a brooding and solitary ninja, but as a baby daddy, he has to think about someone other than himself. For example, he might start to plan for the baby's future, which is a big change from his usually self - centered ways.
One popular Sasuke baby daddy fanfiction could be 'Sasuke's Unexpected Fatherhood'. In this story, Sasuke might face challenges in adjusting to being a father while still dealing with his ninja duties. Another could be 'Sasuke and the Newborn', which may focus on his relationship with the baby and the mother. There's also 'Sasuke's Fatherhood Journey' where his growth as a father is explored in detail.
Sasuke would likely become more protective. Usually Sasuke is very focused on revenge and his own power, but when faced with baby Itachi, he would feel the need to shield him from all harm. His cold exterior might soften a bit as he looks at the innocence of baby Itachi.
Sasuke becomes more gentle. Usually he is cold and aloof, but with baby Sakura, he has to be soft. He shows more patience as he takes care of her needs, like when she cries and he tries to figure out what's wrong.
One great fanfiction could be 'The Bond Beyond Blood'. It beautifully portrays Itachi's complex feelings towards baby Sasuke. It shows how Itachi, even with his difficult mission, still has an unbreakable connection to his little brother. Another is 'Sasuke's Unseen Guardian'. In this, Itachi secretly watches over baby Sasuke, protecting him from the shadows. And 'Itachi's Legacy for Sasuke' is also a good one, which focuses on how Itachi's early actions are setting the stage for Sasuke's future growth.
There are fanfictions where the Sasuke and Sakura baby is a key to some sort of prophecy. This makes their baby a target, and they have to protect it at all costs. In these stories, we often see the couple's relationship strengthen as they face this new threat together.
Their relationship would likely become more intimate and committed. With a baby on the way, Sasuke would feel a greater sense of responsibility towards Sakura. He might be more protective and stay closer to her.
In this fanfic, Sasuke's character would change in terms of his cold exterior. He would soften up a great deal. He might start smiling more often, especially when he is around Sakura. His actions would also be more focused on pleasing her rather than just his own goals. For instance, he might accompany Sakura to the hospital where she works just to be with her, which is a big change from his usually self - centered nature.
Sasuke would probably be very guarded at first. He's not used to dealing with something so innocent and vulnerable. He might be suspicious of the baby's presence and think it's some sort of trap.
It also helps in character development for Sarada. Her clinginess can be seen as her way of learning from Sasuke. In many fanfictions, she observes his ninja skills and his way of dealing with things while clinging to him. For example, in some, she watches how he assesses a situation during a village emergency while staying close to him. And this is a really interesting way to show her growth as a character.
You can start by searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. Use specific keywords like 'Itachi', 'baby Sasuke' and 'fanfiction'. Check the ratings and reviews of the stories. High - rated ones with positive reviews are more likely to be good.