Perhaps a fanfiction where a long - lost ancient magic resurfaces in a character, enabling them to control Grimm. The character then has to struggle with the moral implications of using this power, as controlling Grimm is generally seen as a very dark and dangerous ability in the RWBY universe. They might try to use it for good, like stopping Grimm attacks without harming the Grimm, but face opposition from others who don't believe it's possible to use such a power benevolently.
In a 'rwby control grimm fanfiction', it could be interesting if a group of villains managed to gain the ability to control Grimm. They start using the Grimm in more strategic and coordinated ways, posing a much greater threat to the heroes. The heroes then have to figure out how to counter this new threat, either by finding a way to disrupt the control or by developing their own means of Grimm control to level the playing field.
Well, one interesting idea could be exploring the relationship between Ruby and the Grimm in a unique way. Maybe she discovers a way to communicate with them, which changes the whole dynamic of the story.
A possible fanfiction could focus on a team-up between RWBY and Naruto characters against a common enemy that has the power of both Grimm and some dark ninja jutsu. For example, they might have to face an evil organization that is using Grimm to create chaos in the Naruto world while also using forbidden ninja arts. Or perhaps a fanfic could explore the concept of a RWBY character having a Sharingan - like ability that they gain in the Naruto world and how it changes their combat style and relationships with others.
One idea could be exploring the origin of the Grimm in a unique way. Maybe there's a long - forgotten ancient civilization that had a hand in creating them. Another could be a story about a Grimm that has some sort of self - awareness and is trying to break free from the normal Grimm behavior. Or perhaps a fanfiction where a character from RWBY has to team up with a Grimm - like creature to defeat a greater evil.
A great concept for a RWBY Parasitic Grimm fanfiction could be a story where a character discovers that they have a unique ability to resist or even control the Parasitic Grimm. This could lead to a conflict within the RWBY universe as some see this character as a threat while others see them as a potential solution to the Grimm problem. You could also explore how the Parasitic Grimm's existence changes the balance of power in the world, not just between humans and Grimm, but also among different factions of humans.
A magical artifact might be the source. For example, a long - forgotten amulet that was created by an ancient civilization with the power to influence Grimm behavior. If a character discovers this amulet and figures out how to use it, they can gain control over the Grimm. This could involve a complex process of deciphering the amulet's inscriptions and learning the proper incantations or rituals associated with it.
Well, a possible plot in 'rwby controls grimm fanfiction' is that the whole team RWBY starts to experiment with Ruby's new - found ability to control Grimm. They could face moral dilemmas, like whether it's right to use the Grimm as weapons. Maybe they try to use controlled Grimm to gather intelligence about Salem's plans. Or, they could accidentally create a new type of Grimm - hybrid when Ruby's control goes a bit wrong during an experiment.
Perhaps a half - Grimm character is hunted by both Grimm and humans. The Grimm see it as an abomination, and the humans fear its power. The story could follow their journey to find a place where they can be accepted. They might encounter various characters from RWBY along the way, and their interactions could lead to different moral dilemmas.
One idea could be a story where a powerful Demon Grimm is awakened by an ancient ritual gone wrong. The main characters in RWBY have to team up with unexpected allies to defeat it. They might discover new powers or abilities within themselves during the battle.
One idea could be a story where a humanoid Grimm has the ability to blend in with humans and is on a mission to infiltrate Beacon Academy. It could create chaos by spreading false information among the students. Another idea is a humanoid Grimm that has a strange bond with a Huntsman, and they have to figure out if they can trust each other or not. And perhaps a humanoid Grimm that is actually a failed experiment of some sort of dark magic, and it's trying to find its place in the world of Grimm and humans.
One idea could be a character who is turned into a Grimm due to a failed experiment. They then have to struggle with their new form and inner Grimm instincts while still having memories of their human life. Another could be a human turned Grimm as a result of a dark magic spell, and they try to find a way to reverse it while being hunted by other Huntsmen and Grimm alike.