It could be a powerful AI or a mad scientist. They might see Casshan's power and want to control him by brainwashing, so they would be the antagonists.
One possible plot could be that an evil force brainwashes Casshan. They manipulate his memories and values. As a result, Casshan starts to target the people he used to protect. His friends then have to find a way to break the brainwashing, which could involve a long and difficult journey filled with many challenges and revelations about Casshan's true nature.
One common theme is the exploration of power dynamics. Neo and Smith have very different types of power within the Matrix universe, and fanfiction often plays with how they interact and either compete or cooperate based on that power. For example, in some stories, Smith tries to overpower Neo using his ability to replicate, while Neo uses his connection to the Source.
It's possible. First, consider what kind of 'brainwashed' aspect you're interested in. Is it a psychological exploration or part of an action - packed plot? Once you have a clearer idea, it'll be easier to search for. Also, reaching out to other Casshan fans in forums or groups might lead you to a great 'brainwashed casshan fanfic' as they may have come across one already.
I'm not entirely sure specifically what a 'casshan brainwashed fanfic' is without more context. It could be a fan - created story related to something named Casshan where a character is brainwashed. Maybe it's in the context of a particular anime or game.
Sure. One popular piece of Human Smith Neo fanfiction is 'The New World of Neo and Smith' which explores an alternate reality where Neo and Smith have to team up against a new common enemy. It's full of action and some really interesting character dynamics.
One common theme could be the struggle against the brainwashing. Casshan might be fighting to regain his true self and free his mind from the control that has been imposed on him.
To find 'casshan brainwashed fanfic', begin with the major fanfic hosting sites. Archive of Our Own is known for its extensive collection of various fanfics. Type in 'casshan brainwashed' in the search function. FanFiction.net is also a possibility. Additionally, if there are Casshan - specific fan groups on platforms like Facebook or Reddit, it's worth checking there. Fans in those groups might be able to point you in the right direction or might have even written the fanfic you're looking for themselves.
One possible development is that Neo becomes more protective. As she's going to be a mother, she might become more aggressive in defending herself and her unborn baby from any threats in the RWBY world. This could also lead to her making new alliances or breaking old ones depending on who she perceives as a threat or an ally. Another aspect could be her internal struggle with her new identity as a soon - to - be mother, which could change her personality over time.