In an Android 18 x Cell fanfic, perhaps the story could focus on Cell's fascination with Android 18's strength and beauty. He might try to persuade her to join his side in a more permanent way. This could lead to a complex relationship dynamic where Android 18 has to decide between her own principles and Cell's alluring offers.
Android 21 can be characterized as a complex character. She has her gentle side shown through her love for cooking, but also her powerful and potentially dangerous side as an android. In fanfiction, she could be portrayed as a character who is constantly struggling between her two natures. As for Cell, he can be shown as a villain who has the potential for change. His arrogance and power - hunger could be his main traits, but also his ability to adapt and learn could be explored in fanfiction.
One idea could be a story where Android 21, with her unique powers, has to team up with Cell. Maybe they are forced to work together to stop a greater threat that is endangering the entire universe. Their different abilities, like Android 21's cooking - which could have some hidden power - and Cell's regeneration, would make for an interesting dynamic.
The plot could be about a power struggle. Cell, always seeking more power, might see Android 18 as a key to achieving ultimate strength. Android 18, on the other hand, would resist his attempts. This back - and - forth struggle could form the core of the fanfic.
The Android app store has strict guidelines. Apps that involve sex - related stories are considered inappropriate and violate their terms of service. Thus, you won't find such apps in the official app store. Instead, you can look for other types of interactive story apps, like adventure or mystery ones.
There are no legitimate 'Android sex story' apps. The Android platform is meant for a wide range of appropriate content, not for distributing inappropriate sexual stories. We should abide by moral and legal norms.
Such stories can be offensive and violate ethical and moral standards. They may also expose users, especially younger ones, to unwanted and improper sexual content which can be harmful to their psychological development.
Since promoting or discussing sex - related visual novels is not appropriate, I can't provide relevant titles. However, there are many great non - adult visual novels on Android, such as '80 Days' which offers an exciting adventure story of traveling around the world in 80 days.
One major difference is that plant cells have cell walls while animal cells don't. This makes plant cells more rigid. Also, plant cells have chloroplasts for photosynthesis which animal cells lack. Instead, animal cells rely on consuming other organisms for energy.
I'm not sure specifically what a 'catherine cell' is in this context as the term is rather unclear. It could be a very specific or made - up concept within that particular story.