Some fanfic ideas could involve Grimm hybrids. For example, a Grimm that is part wolf and part snake, with the speed of a snake and the strength of a wolf. Another idea is to write about a world where the Grimm are not just mindless monsters, but have a complex society among themselves. How would the RWBY characters deal with that? Also, a fanfic centered around a character who has the ability to communicate with Grimm, but has to keep it a secret from everyone else.
One idea could be a story where Velvet discovers a new type of Grimm with unique abilities. She then has to figure out how to combat it, using her skills and the help of her friends. Maybe she could study the Grimm's behavior and weaknesses in secret to surprise everyone when she reveals her knowledge.
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 plot idea could be a group of hunters discovers a new type of Demonic Grimm that can possess other Grimm, creating an army. They have to find the source of this new threat and stop it before it overcomes all of Remnant. Another could be a young huntress in training who has a special ability to sense Demonic Grimm and she teams up with some unlikely allies to face a powerful Demonic Grimm lord that has been hidden for centuries. A third idea is that the Demonic Grimm start to corrupt the minds of some of the hunters, turning them against their own kind, and the remaining hunters have to fight both the Demonic Grimm and their former comrades.
One idea could be Ruby facing a new type of Grimm that has unique abilities, like the ability to manipulate time in a small area. This would put Ruby in a tough situation where she has to figure out how to combat it while being affected by the time distortion. Another plot could involve Ruby getting lost in a Grimm - infested area and having to rely on her wits and the little resources she has to survive and find her way back to her team.
One idea could be that the characters have to face a new type of Grimm that has emerged from the Pacific region. These Grimm could have unique abilities like being able to camouflage in the ocean or use water-based attacks. Another plot could involve the team having to form an alliance with a local group in the Pacific area who have their own ways of dealing with Grimm.
One popular 'rwby gamer grimm fanfic' might be those where the characters use gamer - like skills to fight Grimm. For example, a story could have Ruby using her scythe in a more strategic, game - level - up kind of way against the Grimm. It often adds an interesting twist to the RWBY universe.
One popular 'rwby grimm fanfic' is 'Grimm Tides'. It has an interesting take on how the Grimm interact with the world of RWBY. Another is 'Among the Grimm', which delves into a character's journey within the Grimm-infested areas. And 'Grimm's Legacy' is also great as it explores the origin and possible future of the Grimm in the RWBY universe.
A fanfic could explore the origin of the Grimm from a non - violent, more scientific or magical research perspective. Maybe a character in the RWBY universe decides to study the Grimm in a laboratory setting, trying to understand their nature and find ways to prevent their spread without directly engaging in combat all the time.
Often, there are plots where Pyrrha has to protect her friends from a horde of Grimm. This emphasizes her loyalty and self - sacrifice. Some fanfics also explore the idea of Pyrrha having a special connection to the Grimm, like being able to sense them in a unique way, which then leads to various adventures and challenges as she tries to understand this connection and use it to her advantage in the fight against the Grimm.