Sasuke would likely first show a stoic exterior when he finds out. However, internally, he's in turmoil. On one hand, he's happy that he and Sakura are going to have a child. On the other hand, he's worried about the potential dangers his family could face because of his past enemies. So, he might start making plans to keep them safe, like finding a more secure place to live.
In some fanfics, Sasuke might initially be shocked. He could then feel a mix of joy and fear. Joy because he's starting a family with Sakura, but fear because of the responsibilities and potential dangers that might come with it.
In some fanfictions, Vegeta is initially shocked. He might stand there in silence for a moment, his eyes wide. Then he could feel a strange mix of emotions, like pride and fear. He's proud to be having a child with Bulma but also fears for the safety of his family given his dangerous past and the many enemies he has.
He might be initially shocked. Snape has deep and complex feelings for Lily. His reaction could range from a moment of stunned silence as he processes the news. He may also feel a pang of jealousy towards the father, whoever that is. Given his love for Lily, he'd probably be very protective in his own way, despite the situation being complicated by their past and his past actions and associations.
Sasuke might initially be shocked. He has always been a bit aloof and focused on his own goals. But once the shock wears off, he would probably feel a sense of protectiveness over Sakura and their unborn child. He'd start to think about how to keep them safe in the dangerous ninja world.
Sasuke might be initially shocked. He has always seen Naruto as a rival and suddenly finding out Naruto is a girl could completely change his perception. He may start to view Naruto in a more protective way, as his traditional views of gender roles might make him feel the need to safeguard her now that he knows she's female.
Sakura might initially be a bit annoyed by Sasuke's possessiveness. She's a strong - willed woman, after all. But she also understands that it comes from his love for her and the baby. So, she may tolerate it to some extent.
He might be overjoyed at first. Castle has always been deeply in love with Beckett, and a baby would be like a new adventure for them. He'd probably start making plans right away, thinking about baby names and how to turn one of the rooms in their place into a nursery.
He would likely be initially shocked but then filled with joy. He might become very protective, using his skills to keep the pregnant person safe from any harm in the dangerous Middle - earth setting. He could also start making plans for the future, like finding a safe place for the family to live.
Sasuke may initially freeze in disbelief. His mind would be racing with thoughts. He might recall all the things he has been through and wonder if he can provide a stable and loving environment for the child. After a moment of silence, he would probably hold Sakura's hand tightly and tell her that he will be there for her and the baby, no matter what challenges lie ahead.
In some fanfictions, Sakura may be determined to find Sasuke and bring him back. She could set out on her own journey, facing various challenges along the way, and growing both as a person and as a ninja in the process of trying to reunite with him.