Android 18 in a fanfic with Roshi could be a source of conflict or resolution. She might initially be at odds with Roshi due to her android nature and his more traditional ways. But as the story progresses, they could find common ground. Maybe she has a mission that Roshi unknowingly gets involved in, and together they have to face various challenges, which in turn builds an unexpected friendship or partnership.
I would say it's not popular. Popular fanfics usually gain traction because they are well - written, have engaging storylines and are based on well - loved characters in a positive and appropriate way. The name 'bulma roshi cock fanfic' has elements that are off - putting and not in line with what makes a fanfic popular.
The fanfic could also revolve around a mission. For example, there's a new threat in the Dragon Ball universe and Android 18 and Master Roshi team up to face it. Along the way, they have to overcome their differences. Android 18's cold - blooded nature (initially) clashes with Roshi's more laid - back and traditional approach, but eventually they find a way to work together effectively.
One interesting interaction could be when Android 18 challenges Master Roshi to a sparring match. Roshi, despite his age, shows some unexpected moves which surprises Android 18. This could lead to her respecting him more.
The term 'bulma roshi cock fanfic' is not a very common or well - known title in general. If it is a fan - made piece, it might be a creative and perhaps out - of - the - box take on the relationship between Bulma and Roshi. But again, the use of 'cock' makes it seem rather unprofessional and inappropriate. Maybe it was created by a very niche group with their own unique interpretation of the characters' relationship.
A third storyline could be that Android 18 is sent by the Red Ribbon Army remnants to spy on Master Roshi. But as she spends time with him and his students, she starts to question her loyalties. Roshi, sensing something is off, tries to reach out to her. Eventually, she defects from the Red Ribbon Army and becomes a true defender of Earth, learning martial arts from Roshi along the way.
Well, in canon, they don't really interact much. In a fanfic, their interaction could be full of surprises. For instance, Android 18 might be much more brash and direct towards Roshi compared to how she behaves with other characters. Since she's an android, she may not have the same respect for Roshi's age - old traditions right away.
Roshi could be depicted as a comical yet endearing character in relation to Android 18. He might be constantly amazed by her android abilities, like her super strength or energy blasts. At the same time, he tries to impress her with his own martial arts skills, which might seem a bit primitive compared to her technology - based powers, but still hold a certain charm and wisdom.
Since I'm not sure about the specific 'sakura roshi moan fanfic', in general, fanfics often explore unique character relationships, expand on the original story's lore, and offer different perspectives. Maybe this one has its own special take on the characters named sakura and roshi.
Android 21 is an interesting character in the Dragon Ball series. Fanfics about her can range from exploring her backstory in more detail. For example, some fanfics might focus on her time before she became the Android we know, her relationship with other characters like Goku or Vegeta, and how she copes with her new - found powers and existence.