Some common themes are healing and growth. The Winter Soldier has a lot of emotional and mental wounds, and the relationship with the daughter can be a catalyst for his healing process. It also might involve the theme of identity. The daughter might help him rediscover parts of his identity that were lost during his time as a weapon. Additionally, the theme of love, not necessarily romantic but a deep, platonic love that develops between them as they interact and get to know each other better.
One common theme is the idea of the Winter Soldier's struggle with his past and how it affects his relationship with the reader's daughter character. Another could be protection. The Winter Soldier, with his combat skills, often ends up in a role of protecting the daughter from various threats. And there's also the theme of redemption through his connection with her, as she might see the good in him that he doesn't see in himself.
One common theme is protection. The Winter Soldier often feels a strong need to protect his sister (the reader). Another theme is rediscovery. Since he has a complex past, they usually have to rediscover their relationship.
First, start with his past. Show how his experiences as the Winter Soldier have made him who he is at the start of the fanfic. Then, gradually introduce the influence of the reader's daughter. Maybe she shows him kindness, and that starts to chip away at his cold exterior. As the story progresses, he should start to question his old ways and beliefs. By the end, he could have made a significant change, like becoming more open and less of a weapon, more of a protector with a new sense of purpose.
Well, a typical theme is the 'friends - to - lovers' scenario. It starts with the reader and the crush being friends, and then feelings start to develop in an unexpected way. Also, there's often the theme of the unexpected encounter. They meet in a strange or unplanned situation that kicks off the story. And sometimes, there's the theme of redemption. Maybe the crush has made some mistakes in the past and is trying to make up for it in the relationship with the reader.
The theme of identity is quite prevalent too. The Winter Soldier struggles with his own identity, being both a weapon and a person. The Reader can play a role in helping him figure out who he really is. In addition, there's the theme of sacrifice. Sometimes, either the Winter Soldier or the Reader has to make sacrifices for the other, which adds depth and drama to the story.
One common theme is protection. Dean is often portrayed as being extremely protective of his daughter, ready to face any danger to keep her safe.
Family love is a very common theme. It shows how John loves and cares for his daughter unconditionally. Another theme could be protection. John is often depicted as a protector, shielding his daughter from harm.
One common theme is the clash of cultures. Naruto's world is full of ninjas and chakra, while the Winter Soldier's world has advanced technology and a different kind of warfare. Another theme could be redemption. Just as the Winter Soldier has a past to atone for, Naruto also has his own demons to face, and in fanfics, they might help each other in that journey.
Some common themes might include cultural exploration of Brazil, strong character development of the reader and the Brazilian character. There could also be themes of adventure or romance, with the big booty aspect perhaps being part of the physical attraction description within the story.
One great 'winter soldier x reader sister fanfic' could be 'The Winter Soldier's Little Sister' on Fanfiction.net. It has a really interesting plot where the reader is the sister and there are a lot of emotional moments as they reconnect in a world full of chaos and danger.
There could also be themes of power and protection. Damon may be in a position of power in some way, and how he uses that power in relation to the daughter figure, whether it's to protect her or potentially misuse it, can add a lot of depth to the story. Also, the exploration of the daughter's bisexuality might involve themes of identity formation and the search for true love in a more inclusive sense.