He could also be a bit overbearing. Since he has his own set of rules and ways of doing things, he might try to impose some of that on his sister during her pregnancy. For example, he might try to control the environment in which she lives to make it 'optimal' for the baby, not realizing that he's being a bit too much. But at the same time, deep down he might be excited to be an uncle in his own unique Sheldon - ish way.
Sheldon might initially be very confused. He's not very good with emotions and the idea of a new life coming into the family could be quite a shock to him. He may start to research about pregnancy and babies in his typical scientific way, trying to understand what's going on.
There are quite a few out there. Some focus on how her pregnancy affects the group dynamic. For example, in some fanfictions, it might lead to Sheldon having to deal with new emotions as he's about to become an uncle. He might be confused about how to act around a baby, which could create some really funny and heart - warming scenarios in the story.
Sheldon might initially be a bit shocked and out of his element. He's used to his very structured life, and a baby on the way throws a huge wrench in that. But then he could start to get excited about all the scientific aspects of pregnancy and childbirth.
Percy might be initially very confused and hurt. He may try to find his sister and understand why she has left him. He could also become very angry and feel betrayed, which might lead him to take some rash actions.
Leonard would probably be really shocked at first. He's known Sheldon for so long and might not have expected him to become a father. Howard and Raj would likely be full of jokes and teasing, but also offer their support in their own goofy ways.
She could be very sad. After all, Naruto is likely an important person in her life. She might feel abandoned and start to question why Naruto left her.
At the start, Naruto might be in shock. He can't believe that his own family would do such a thing. After the initial shock wears off, he would probably be determined to show them that they made a mistake. He would go on adventures, learn new skills, and meet new people. Through these experiences, he would become more independent and self - reliant. And when the time is right, he might try to confront his family, not in a vengeful way, but to show them that he has changed and that their banishment was unjust.
Naruto might initially be heartbroken. He has always longed for his father's love and acceptance, so being disowned would be a huge blow. He could go into a state of depression for a while, withdrawing from his friends and normal activities. But then, Naruto is a fighter. He would likely start to question his father's decision and try to find out the real reason behind it, vowing to prove himself worthy if there was some misunderstanding.
As time goes on, Naruto could become angry. He might feel betrayed by his family's lack of attention. This anger could fuel his determination to become stronger on his own, without relying on his family. He may start to train harder and focus on achieving his own goals, using the rejection as motivation.
He might be initially shocked. I mean, he's used to all the demigod stuff, and then finding out his mom has wizard powers would be a whole new level of surprise.
Naruto may also try to find solutions. Despite the heartbreak, his optimistic nature might still shine through a bit. He could start to search for ways to mend the relationship with his parents, whether it's through magic in the Naruto world or by trying to prove his worth to them.