A very common theme is redemption. Since Delta has a complex past, fanfictions often involve a female character helping him find redemption or vice versa. Another popular theme is survival. In the harsh world of Rapture, female characters in these fanfictions are often depicted trying to survive alongside Delta.
One common theme is protection. Delta is there to protect the Little Sister from the various threats in Rapture.
I'm not sure if you've heard of the fanfiction 'Delta's Female Protege'. It's about a young girl who looks up to Delta and tries to follow in his footsteps. The story is filled with action and emotional moments. It also gives a great view of the Rapture environment from a different angle compared to the original game.
The fanfiction about Bioshock 2's Delta and Little Sister often explores their unique relationship. Delta is a Big Daddy, and his bond with the Little Sister is central to the story. It might show his protective nature towards her, and how they interact in the dark and dystopian world of Rapture.
Delta's character can be developed through his moral choices when it comes to the Little Sister. For instance, if he's faced with a situation where he has to choose between the safety of the Little Sister and getting more ADAM, his decision would reveal a lot about his character. He could also learn new skills or abilities in order to better protect the Little Sister, which would show his adaptability and growth as a character.
Perhaps the plot focuses on how Delta and the Little Sister survive in a post - apocalyptic Rapture. They could be on a quest to find a new source of ADAM that doesn't involve harming others. The relationship between them could be tested when they meet other Little Sisters and Delta has to decide whether to protect all of them or just his own Little Sister.
Probably Freyja Wion is quite popular. Her singing abilities and kind - hearted nature make her a great character to include in crossovers.
Often, characters who are powerful yet morally ambiguous are popular. For instance, an OC who has the power to manipulate the Vigors but is not sure whether to use them for good or evil. They can be a sort of anti - hero, which always attracts readers.
One popular theme is romance. In some fanfictions, a female Saitama might have a romantic relationship with another hero or a civilian. It adds a new layer to her character as she tries to balance her super - strength with her feelings. Another theme is identity. Since she's a female version of Saitama, she may struggle with how others perceive her compared to the well - known male Saitama. Also, the theme of self - discovery is quite common, where she learns more about her own power and what it means to be a hero as a woman.
One of the main themes is power struggle. Characters are constantly trying to gain more power and influence in the CZ Delta world.
One popular theme is friendship. Since Naruto is known for his ability to befriend almost anyone, when Neji is female, it can add a new layer to their friendship. They can support each other in different ways, like Naruto inspiring female Neji to break free from the constraints of her clan, and Neji being there for Naruto during his tough times.