There could be a fanfic where Raven adopts a character from a different kingdom. This adoption might be part of a political move at first, but as time goes on, real bonds form. For example, the adopted character could learn about Raven's past and help her come to terms with some of her own demons.
One popular RWBY Raven and Tai fanfiction is 'The Unspoken Bond'. It delves into their past relationship and how it affects their current interactions within the RWBY universe. It has great character development and an engaging plot.
I'm not sure of a specific one off the top of my head, but you can try searching on popular fanfiction websites like Archive of Our Own. Just type in 'RWBY Raven adopts' and you should get a list of relevant stories.
One interesting fanfiction could be about the adventures of the black raven in a magical forest. The raven might have special powers that it uses to protect the forest from dark forces.
There's also 'Adopting Tom Riddle: A Redemption Arc'. This fanfiction could focus on the idea of using love and positive influence to redeem Tom. The adoptive family could introduce him to different values, like friendship and loyalty, which would be a huge contrast to his original upbringing in the orphanage.
One interesting RWBY Raven fanfiction could be about her backstory before joining the tribe. It might explore her relationships with other characters like Taiyang in more depth. Another could focus on her training Ruby in a secret scenario, showing a different side of her as a mentor.
A plotline could be that Raven and Red X are forced to work together to stop a greater evil. They start off not trusting each other but gradually learn to rely on one another's strengths.
One interesting RWBY Team RWBY fanfiction could be those that explore their training days in more detail. For example, a fanfic might show how they overcame a particularly difficult training obstacle together. Another type could be fanfictions that focus on their relationships outside of combat, like how they celebrate birthdays or holidays as a team.
One interesting storyline could be a crossover where Naruto's ninjutsu skills are combined with Raven's abilities in the RWBY universe. For example, Naruto might teach some of the RWBY characters about chakra control, and in return, they show him how to use Dust. Another could be a story where Raven and Naruto have to team up to face a common enemy that threatens both their worlds. They could learn from each other's fighting styles and develop new strategies.
One interesting 'rwby raven bandits fanfiction' could be about Raven's past with the bandits before she joined Team STRQ. Maybe it shows how she got involved with them in the first place.
One interesting plotline could be Vernal's struggle with her identity. Since she was sort of a stand - in for Raven, she might question her own self - worth. Another could be Raven's relationship with Vernal, whether it's a true friendship or just a means to an end for Raven. For example, in some fanfictions, Vernal discovers Raven's true intentions and has to decide whether to stay loyal or break away.