The theme of recovery is quite common. Bucky is recovering from physical and mental wounds, and fanfictions often depict this process. He has to learn to trust again, both himself and others. Another theme that shows up often is the idea of fitting in. Bucky is from a different time, and he has to adapt to a new era. Fanfictions will show his struggles and his successes in becoming a part of this new world.
One common theme is redemption. Since Bucky has a dark past as the Winter Soldier, many fanfictions focus on him trying to make up for what he has done. Another theme is friendship, like his relationship with Steve Rogers or other new friends he makes in the modern world.
One common theme is identity. Since it's a female version of Bucky, the story often explores how she reconciles her new identity with her past self. Another theme is survival, as she has to deal with all the traumas and challenges.
One common theme is redemption. Bucky often has a troubled past, and the presence of a baby gives him a chance to start anew and be a better person. For example, in many stories, he tries to atone for his past actions by being a loving and protective father.
One common theme is redemption. Bucky has a dark past as the Winter Soldier, and often in fanfiction, the reader helps him find redemption. Another theme is love. It can be a slow - burn love story between the reader and Bucky. And there's also the theme of acceptance, as Bucky has to accept who he is now after all he's been through, and the reader is often there to support him in that journey.
One common theme is redemption. Bucky Barnes has a complex past, and in many OC fanfictions, the OC helps him in his journey of redeeming himself. For example, the OC might be someone who has also faced hardships and can understand his pain.
The theme of acceptance is quite common. Bucky is different because of his past and his enhanced abilities. In fanfiction, the female character is often the one who accepts him fully for who he is. Also, themes related to family can be found. The female might introduce Bucky to a new sense of family or be part of his journey to reconnect with his own lost family.
A common theme is trauma. Bucky has endured so much, from being brainwashed by Hydra to all the violence he was forced to commit. His struggle to come to terms with that trauma is often explored. Another theme is redemption. Fans like to write about him trying to make up for his past actions, even though they weren't his fault. Healing is also a big theme, both physical and emotional healing from all the pain he's suffered.
One common theme is redemption. Bucky has a dark past due to his time as the Winter Soldier, and the OC often plays a role in helping him find redemption. For example, the OC might encourage him to face his past actions and make amends.
The theme of acceptance is also prevalent. Bucky has to accept this new role of being a father - to come to terms with his own self - image in relation to the baby. And also, the people around him have to accept this new phase in his life, which can lead to some interesting plot developments and character interactions.
Trauma and recovery are very common themes. Given his history of being experimented on and used as a weapon, fanfics often deal with how he copes with his past traumas. Love is also a theme. Sometimes it's romantic love, where Bucky finds someone who can accept him for who he is, with all his flaws.
One common theme is mentorship. Bucky, with his years of experience, often takes on a mentorship role for Peter. For example, in many fanfics, he teaches Peter how to better handle combat situations and deal with the psychological aspects of being a hero.