Blake is also interesting. Her past as a member of the White Fang and her struggle for equality for the Faunus can be delved into deeply. A fanfiction could focus on her reconciling her past actions and her future goals, as well as her relationship with Yang and the rest of the team.
Cinder Fall can be a fascinating character to focus on in fanfiction. Her motives are often shrouded in mystery. A story could explore her backstory, what led her to become a villain, and if there is any chance for her redemption. This would add a different perspective to the RWBY Henceforward fanfiction.
Ruby is always a great choice. Her journey from a young huntress - in - training to a more experienced leader provides a lot of material for fanfiction. You can explore her growth, her relationships with her team, and how she copes with the increasing challenges.
I think Weiss from RWBY could be really interesting to focus on. Her strict upbringing and powerful semblance would contrast well with the more chaotic nature of the Agents of Mayhem. From the Agents of Mayhem, Brick would be a good character. His brute strength and no - nonsense attitude could lead to some humorous and action - packed scenes when paired with the RWBY characters.
In a 'henceforward rwby fanfic', a new character could be a young boy from a nomadic tribe in Remnant. His semblance is the ability to sense danger from miles away, which has kept his tribe safe for generations. He could join the RWBY gang on their adventures, bringing with him a different perspective on the world. Another potential character is a female knight from an ancient order in Atlas. She has a very strict code of honor and her semblance is the ability to make her armor impenetrable for a short period. Also, a character from a hidden underground city in Remnant could be introduced. This character has a semblance that allows them to phase through solid objects and could provide some interesting plot twists in the fanfic.
You could write a fanfiction where RWBY characters are transported to our modern world. Imagine Ruby trying to understand how cars work or Weiss being shocked by modern fashion. It would be a fun and comical take on the RWBY world. Additionally, a story about the creation of the Grimm and a possible way to end their existence forever could be a very deep and thought - provoking fanfiction.
I think focusing on Ruby and Weiss would be good. Ruby as the leader has so many aspects to explore, like her insecurities and how she overcomes them. Weiss, on the other hand, has her own journey of breaking free from her family's expectations. They also have a great dynamic together, which can be developed further in the fanfic. But Blake and Yang are also important, especially if you want to show their friendship and how they support each other through tough times.
The main family members can be great to focus on. Their relationships, power struggles, and dreams offer a lot of material. For example, the patriarch of the family who has to make tough decisions to keep the ranch going. Another good character could be the strong - willed matriarch who holds the family together. Also, the young and rebellious heir who wants to do things his own way.
Sersi is a great character to focus on. She has a strong connection to humanity and her powers are quite interesting. You could explore her relationships with humans in more detail. Another good one is Ikaris. His loyalty and the internal conflict he might face are good material for a fanfiction. Then there's Kingo, with his love for movies and his unique charm among the Eternals.
All of the members of 4 town are great to focus on in different ways. Tae Young, for example, might be the subject of a fanfiction where his amazing dancing skills are the center of the story. Maybe he gets an offer to be in a big dance competition outside of the band, and he has to decide whether to take it or stay loyal to 4 town. Each member brings their own unique traits that can be explored in fanfiction.
Team RWBY is definitely crucial. Ruby with her leadership skills and determination, Weiss with her family connections and combat abilities, Blake with her knowledge of the Faunus situation which could be relevant in the post - breach chaos, and Yang with her strength. Ozpin also plays a major role as he has the knowledge and experience to guide the rebuilding process.
Yang Xiao Long could be a key character. Her brash and powerful fighting style might be pitted against the kind of foes from the Man of Steel universe. And Weiss Schnee, with her family's influence and her own ice - based powers, could also be in the spotlight. She might have to use her skills in a different context, perhaps in a more technology - heavy and super - powered environment like in Man of Steel.
The friends of the main couple can also be great to focus on. They can add humor, support, or even create some conflict. For example, a friend who is always teasing the couple about their relationship can be a fun addition to the fanfiction.