A great plot idea for a Tokyo Become Human fanfiction is to have an android form a unique bond with a human child. The android could be a caretaker model that starts to develop real parental feelings for the child. This relationship would be complex as society might not accept it. Or, you could write about an android detective who is trying to solve a series of crimes that seem to be targeting androids. As the detective digs deeper, they realize that there is a conspiracy within the human government to frame androids for these crimes to create public unrest against them. Another option is to have an android artist who creates works that start to make humans question their own understanding of what it means to be alive and sentient.
Perhaps a kwami becomes human and tries to use their new form to protect their chosen holder in a more direct way. But they soon realize that being human also means having human weaknesses and they have to be careful not to expose their true identity. They could start to understand the human emotions of fear and vulnerability more deeply.
One idea could be exploring Raph's backstory before the events of the game. Maybe he had a family or a special friendship that was lost. Another could be a story where Raph discovers a new ability within himself and has to learn how to control it. A third plot idea could be Raph getting involved in a mystery that ties back to the android revolution, perhaps he uncovers a secret plot against the androids that could change the course of the revolution.
A sumo fanfic in this context could involve an android being created specifically to be a sumo referee. This android would have to learn all the rules and subtleties of sumo. Along the way, it might face discrimination from traditional sumo enthusiasts who don't believe an android can truly understand the sport. This could lead to a story about acceptance and the android's journey to prove itself in the sumo world.
A more emotional plot could be about a Traci trying to find her 'sister' Traci. She could go on a long journey across Detroit, encountering different characters along the way. Some might help her, while others might try to use her for their own gain. This would be a story full of suspense, hope and despair.
One idea could be a story where an android character, like Kara, discovers she has the ability to become pregnant in a world where androids are evolving. This could lead to a journey of self - discovery as she tries to understand what it means for an android to carry a new life. It could also explore how society views this phenomenon, whether with fear, curiosity or acceptance.
One idea could be that Daniel and Emma get caught up in a mystery within Detroit. Maybe they discover a hidden group of deviants that are planning something big. Daniel's android abilities and Emma's human intuition could work together to solve the mystery.
One idea could be exploring the lives of the androids in the Eden Club before they are 'activated' for customers. Maybe they have their own little community and relationships among themselves. Another plot could be an android from the Eden Club trying to escape and find a new purpose outside of the club, facing various challenges and prejudices along the way. And a third idea is a customer who visits the Eden Club regularly and starts to develop real feelings for one of the androids, leading to a complex relationship.
One plot idea could be that chubby Connor is discriminated against in the android world due to his appearance. But he uses this to his advantage, showing more humanity than the 'perfect' androids. For example, he befriends a human who initially judges him but then realizes his worth.
One interesting plot idea could be a story where an android, who is not part of the main cast, discovers a hidden part of Detroit that holds the key to a past event that could change the relationship between humans and androids. This android could then face the dilemma of whether to reveal this discovery or keep it a secret for its own safety.
One idea could be inserting yourself as a new android model created by CyberLife. You could have unique abilities that set you apart from the existing androids like Connor, Kara, and Markus. For example, you might have the ability to instantly analyze and predict human behavior more accurately than Connor. Another plot could involve you being inserted into the story during the android revolution. You could either side with the androids and use your 'human' knowledge to help them in ways they hadn't thought of, or you could try to find a middle ground between the humans and androids to end the conflict peacefully.