He probably went through a range of emotions. At first, he might have been in shock, unable to believe that such a thing had happened. Then, he would likely turn to his family and friends for support while trying every possible way to find his love. He could have also offered a reward for any information leading to the safe return of his love. He would be constantly worried about the safety and well - being of his loved one.
This sounds like a rather unusual and potentially uncomfortable topic. I'm not familiar with any specific manhwa with such a plotline. It could potentially involve some kind of conflict or danger for the daughter.
If it's someone new in the fanfiction, he could be a bit of an enigma at first. Maybe he's from another district. He might be initially scared but then step up. He'd have to deal with Katniss's strong personality and her fame from the Hunger Games. But over time, he'd grow into his role as a father - to - be and support Katniss through the pregnancy.
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.
Shikamaru would likely be the voice of reason. He would tell Naruto to think things through clearly and help him come up with strategies for dealing with the new situation. Choji might bring over some food to help Naruto out, as he knows how difficult it can be to take care of a child. Ino would be more interested in the child's appearance and would offer to help Naruto with things like shopping for the child's clothes.
She might be a bit confused at first. After all, Itachi has a very complex and somewhat dark past. But she could also grow to understand her father's perspective as she learns more about Itachi herself.
At first, Harry might be in shock. He has always known his parents as James and Lily, so this new information would completely turn his world upside down. He might feel angry, thinking he has been lied to all his life.
Izuku might be shocked at first. After all, he has grown up without his father. But then he could be filled with a mix of emotions like joy, confusion, and anger all at once.
He might be shocked at first. After all, he has probably only heard stories about his father. Then he could be angry, blaming his father for not being around when he was growing up.