Perhaps a new character could be introduced as the main character. This new character could be a transfer student who is pregnant and comes to Yankumi's school. Yankumi then takes it upon herself to help this student not only with her academic and social life at school but also with her pregnancy journey, creating a heartwarming story of mentorship and growth.
It could also be one of Yankumi's students' mothers. This would show a different perspective. The mother might be struggling with her pregnancy while also dealing with her child's issues at school. Maybe she looks to Yankumi for advice and support, and their relationship develops in a unique way throughout the fanfiction.
One possible storyline could be about how the character deals with the challenges of being pregnant while still being involved in the tough world she's in. For example, she might have to balance her pregnancy with her responsibilities to her students or family. Maybe she tries to hide it at first for fear of how others will react.
It could be one of the female characters like Callie. Since she has a complex backstory and strong personality, her being pregnant would bring a whole new dimension to her character arc.
Judy Hopps would be a great choice. She's a strong and determined character. Her pregnancy could bring out a different side of her, showing her vulnerability and also her ability to adapt. It could also create interesting storylines with her partner Nick Wilde, as they navigate this new phase of their relationship.
Tony Hutchinson could also be an interesting choice if the fanfiction takes a different turn. For example, if his partner gets pregnant and he has to deal with his own insecurities and past experiences while supporting her through the pregnancy.
Frankie Stein could be a great main character. Since she's always learning about the world and herself, a pregnancy could be a whole new adventure for her. She might be curious about how her body, which is made up of different parts, will handle pregnancy. And she could bring her unique perspective and positive attitude to the situation.
Sakura would be a great choice. She's a strong and independent female character. Her skills as a medical ninja would add an interesting dimension to a pregnancy story. She could use her medical knowledge to take care of herself during pregnancy and also be a role model for other pregnant women in the village.
Timmy could be a great main character in such a fanfiction. If his mother was pregnant, he could have all sorts of adventures with his fairies as he tries to deal with the upcoming changes in his family.
Mandy could also be a likely candidate. Given her more carefree nature, a pregnancy would force her to grow up and face new responsibilities. It would be interesting to see how she copes with the changes in her body and the expectations that come with being pregnant.
The main character is often the teacher from the original Gokusen series. They play a crucial role in guiding the students and dealing with the various challenges in the fanfic world.
The Capitol could still be the main antagonists. They might see Katniss's pregnancy as a threat, either because they fear the child could grow up to be a symbol of resistance like Katniss or just because they want to maintain control over her. They could try to harm her or the baby in some way.