Wu Zhu did not turn into a human in the end. Wu Zhu was a robot. His identity was the first generation of " emissaries " sent by the Temple to the human world. He had the characteristic of being immortal. Although Wu Zhu had gradually gained his own consciousness and emotions from interacting with Ye Qingmei, Fan Xian, and the others, he was still a robot and had not become human. Thus, Wu Zhu did not turn into a human in the end.
In Detroit: Become Human fanfiction, Lucy is often depicted as a mysterious and alluring character. She might be an android with unique abilities or a figure with a deep connection to the android revolution. Sometimes she is shown as a guide for other androids, leading them towards self - discovery and freedom.
In Ralph fanfictions, we can see different interpretations of his character. Maybe he is given more backstory or his emotions are delved deeper into. Writers might create scenarios where Ralph has to face new challenges outside of the main game plot, which can be really exciting to read.
Charon might also be a character that brings out the emotions of the other characters in the fanfic. If it's a damaged or lost android, the main characters might feel pity or a sense of responsibility towards it. This could lead to character development for those characters as they try to help Charon.
Well, in many Detroit: Become Human fanfics, the character of Charon can be quite interesting. It could be that Charon is a new android created by a rogue scientist, for example. This would bring a whole new set of storylines and interactions with the main characters like Connor, Markus, and Kara. Maybe Charon has unique abilities that set it apart from the other androids in the game's lore.