Peeta is an obvious one. He loves Katniss and would be a great source of comfort. Her mother would be there to handle the medical aspects. And I think Prim would be important too. Even if she's young, she has a kind heart and could be there to offer words of encouragement to her sister as she goes through labor.
Definitely Peeta. He and Katniss have a complex relationship, and he would be right by her side, holding her hand and giving her strength. Katniss's mother would be vital as she has the medical knowledge. Finnick could also be around. He's a good friend and a strong ally, and he might be on guard to protect Katniss and the unborn child from any potential threats.
Peeta is surely an important character. He has a deep connection with Katniss, and he would be there to offer emotional support. Her mother, being a healer, would be crucial in ensuring a safe delivery. Also, Haymitch could be there. He has always been like a mentor to Katniss, and he might use his experience to help in any way he can.
Princess Bella is obviously a very important character as she is the one going into labor. Her partner or husband would also be important as he would likely be there for support.
One possible scenario could be that Peeta is by her side, offering his unwavering support and comfort. He might be nervously pacing at first but then holds her hand tightly as she endures the pain. Another could be that Katniss is in a makeshift hospital in District 13, with the medical team there doing their best to ensure a safe delivery. The third scenario might be that she goes into labor unexpectedly while out in the woods, and she has to rely on her survival skills and the help of a few close friends who happen to be with her to get through it.
Gale could be another important character. Despite his complicated relationship with Katniss, he still cares about her. He might be on the lookout for any external dangers while the birth is taking place. His skills as a hunter and his knowledge of the land could be used to protect Katniss and her new - born baby.
In the fanfiction, it's very possible that Puck would be at Quinn's side during labor. He has a history with her and would surely care about her well - being. Her best friends from Glee club would also be around. Rachel, with her big heart, would probably be there offering words of encouragement. Finn, being a good friend, would also show up. And Santana, who has a strong bond with Quinn, would be there to give her strength and sass when needed.
They could try to create a makeshift safe zone. For example, using magic to barricade an area from the attackers. Ron could use his strategic skills to plan the defense while Harry could use his powerful magic to keep the enemies at bay. Meanwhile, Ginny or other female friends could assist Hermione with the physical aspects of labor, like providing comfort and helping her breathe.
She might be amused. Fanfiction often takes the original story in new and unexpected directions. Katniss could find it interesting to see how others view her world and her character.
One possible plot twist could be that Katniss goes back in time and prevents the Hunger Games from ever starting. Maybe she meets the people who first came up with the idea and manages to change their minds. Another could be that she goes back to a time before her father died and is able to save him, which would completely change her family's situation and her own personality development. A third plot twist might be that she goes back to a crucial moment in the Games and alters the outcome in a way that surprises everyone.
She might face a lack of proper medical facilities. In the chaos of an attack, there would be no calm, sterile environment for the birth. Also, the people around her, like her friends, may not be fully trained to assist in childbirth, which could lead to complications.
Vegeta would also be an important character. His rivalry with Goku would intensify even more. Seeing Goku achieve the Super Saiyan form early would fuel his jealousy and his desire to become stronger. He might even try to find new ways to train or gain power to catch up with Goku.
David is surely an important character as the story is about him going to school.