Lenore in 'The Raven' is the woman that the narrator deeply loved. She is dead, and her absence is what makes the narrator so melancholic. The whole poem is sort of centered around the narrator's mourning for Lenore, and the raven's presence seems to intensify his feelings about her loss.
We don't really know who Raven is just from 'Raven tells a story'. Raven could be an animal in a fable that has been given the power of speech to tell a moral - laden story. Or Raven could be a nickname for someone in a community who is renowned for their engaging storytelling skills.
Magic could be one way. In the RWBY universe, there could be some form of ancient magic that can change the nature of a Grimm. A character might discover a spell or a magical artifact that has the power to make a Grimm friendly. They would then have to figure out how to use it properly without any negative side effects.
The Brothers Grimm collected the stories by traveling around Germany and listening to people. They were interested in the oral traditions of the common folk. They would visit villages and small towns, and sit with the locals to hear their tales. They were careful to note down not just the stories but also the way they were told, with all the unique expressions and dialects. This way, they managed to compile a large collection of real folk stories that became known as the Brothers Grimm stories.
The main theme of 'The Raven' is often considered to be grief and the inability to move on from loss. The narrator is mourning the loss of his beloved Lenore, and the raven's presence and its repeated word 'Nevermore' only deepen his sense of despair and hopelessness.
Raven could be a new character created specifically for this fanfiction. She might be a powerful witch from a distant magical land, with unique magical abilities like the power to communicate with magical creatures on a deeper level.
First, think about the origin of the Demonic Grimm. If it was created from some dark, ancient magic, it might have an otherworldly and terrifying look. For example, it could have a smoky, ethereal body with a skull - like face that constantly changes expressions to show its malevolence. Its attacks should be unique and deadly. Maybe it can drain the life force of its enemies just by touching them. And don't forget about its behavior. A Demonic Grimm that stalks its victims silently, always lurking in the shadows before pouncing, would be very scary.
Raven could be an ancient and powerful witch who has been living in seclusion for centuries. She might have noticed Harry's special aura or his connection to powerful magic and decided to adopt him to pass on her knowledge.
Raven Roth may also be a character who has a mysterious past related to the dark arts. Maybe she was once involved with a group or a situation that had ties to Voldemort, but she has now turned against the dark side. Her knowledge of the dark arts, though dangerous, could be used to help Harry Potter understand his enemies better and find ways to defeat them. This complex backstory would make her a very interesting character in the fanfiction.