One common theme could be the psychological impact of abuse. It might show how the abused character, likely the younger brother in the FNAF 4 context, is affected by the actions of the big brother. Another theme could be the idea of fear and how it manifests in the story, maybe related to the already spooky nature of the FNAF world.
Often, there's a theme of broken trust. Since it's about big brother abuse, the natural bond between siblings is damaged. In these fanfictions, this broken trust can lead to all sorts of consequences for the characters. There may also be a theme of revenge or redemption, where the abused character either seeks revenge on the big brother or tries to find a way to redeem the relationship in some way.
Well, it depends on how it's written. If it's just a fictional exploration of a dark theme without promoting or glorifying abuse, it can be considered a form of creative expression. However, if it's overly graphic or seems to enjoy the idea of abuse, then it's not ethical.
Protection is a very common theme. The big brother often takes on the role of protecting the little brother from harm, whether it's physical danger or emotional distress.
One common theme is Harry's growth. In these fanfictions, he might face new challenges as a 'big brother' figure, which helps him develop in different ways compared to the original story.
Competition is also a big theme. Given that 'Big Brother' is centered around competition, and 'Glee' has competitions like sectionals. Fanfics might create new competitions where characters from both shows compete against each other, like a singing - and - strategy - combined competition.
Family bonds are also a prevalent theme. These fanfictions often explore the deep connection between the two brothers. It could be about how they rely on each other in a difficult family situation or how they strengthen their family unit through their relationship. Sometimes, they might face family secrets or issues that they have to deal with together, which further emphasizes the importance of their bond.
Friendship can also be a theme. For example, female characters might form alliances with other survivors or even with some of the animatronics in a more friendly interpretation of the FNAF world. They work together to face the challenges. This is different from the more horror - based official storylines where the animatronics are mostly threats. And it adds a new layer of depth to the fanfiction.
Another common theme is transformation. There are fanfictions where FNAF characters are transformed into Pokemon or vice versa. This allows for exploring new abilities and relationships. Also, survival is a theme. Just like in FNAF, the characters in the fanfiction might have to survive in a strange new world that combines the two universes, using the skills from both Pokemon and FNAF.
A lot of 'glee big brother' fanfictions explore the idea of the characters' personal growth. Being in the Big Brother house forces them to face new situations and challenges, which can lead to them becoming more confident or learning new things about themselves. Also, there are often themes related to competition and rivalry, similar to what we see in the actual Big Brother show, but with a Glee - style twist.
One common theme is friendship. Often, the female Bonnie forms bonds with other animatronics or even with the humans in the FNAF world. For example, she might team up with Freddy to solve a mystery in the pizzeria.
A common theme is the clash of two different universes. Naruto's ninja world with its magic and combat skills meets the horror - filled FNAF world. Another theme is the development of relationships within the harem. It could be about Naruto gradually getting closer to the various characters from both worlds.