Sharon Carter could be in the fanfic. She could be the one who provides some medical or scientific insights into what's happening to Bucky. Maybe she has some knowledge of the experimental substances that might be related to Bucky's growing belly and tries to use her resources to help him.
Maybe Bucky has to go undercover in a place where overeating is a norm as part of his mission. So, he starts to gain weight, especially in his belly area. This could lead to humorous situations like trying to fit into his old clothes or being recognized by the enemy because of his changed appearance. And in the process, he discovers new things about himself and his relationship with food.
It could be a jealous rival of Bucky. Maybe this rival is envious of Bucky's popularity and when he sees Bucky's round belly, he uses it as an opportunity to mock and undermine him at every turn, becoming the main source of conflict in the fanfic.
Obviously, Bucky is a main character. He's the one with a complex past that needs to be dealt with. And the therapist is also a main character as they are the ones who will guide Bucky through his emotional and mental journey. There could also be other supporting characters from Bucky's world, like his friends who might interact with him during his therapy process, but the central focus would be on Bucky and the therapist.
His friends could be involved. They might encourage him to get the haircut or be there to support him during the process.
I'm not entirely sure specifically what 'bucky belly balloon fanfic' is about as it could be a very niche or made - up concept within a particular fan community. It might involve a character named Bucky and some sort of balloon - related or 'belly' - themed story created by fans.
Well, obviously the Avengers themselves are the main characters affected. Captain America would be one of the most affected. Given their long - standing friendship, any shock from Bucky would deeply impact Steve Rogers. Tony Stark would also be greatly affected. Their relationship has been rocky in the past, and if Bucky does something unexpected, it would likely stir up new tensions or alliances between them.
Tony Stark could be another important character. He has been a sort of mentor to Peter in the original stories. In this fanfic, he might be a bit jealous at first that Bucky has this new role in Peter's life. But eventually, he could also contribute to Peter's growth, perhaps by providing new technology for Peter's Spider - Man suit in light of Bucky's more hands - on combat training.
One possible plot could be that Bucky, after some kind of strange experiment or accident, starts to develop a round belly. His friends are initially worried but as time passes, they notice that he also gains some unique powers related to this change. And the story could follow his journey of learning to control these new powers while dealing with his changed physique.
Another possibility is a new villain who has the power to control Bucky's actions. This villain could be after Tony for his wealth or his influence in the superhero community. The villain forces Bucky to do the dirty work while staying in the shadows.
First, check out some of the major fan - fic communities related to the possible source material of 'bucky'. If 'bucky' is from a particular movie, TV show, or book series, look for dedicated fan - groups on social media platforms like Facebook or Reddit. They may be able to point you in the right direction, or even have links to where 'bucky belly balloon fanfic' can be found. Also, don't forget to search on general fan - fic search engines, which can help you locate it.