Well, in this fanfiction, perhaps the snake is a magical guide for Harry. It could lead him to hidden places in Hogwarts. For example, it might show him secret passages that were previously unknown, adding an exciting new dimension to the story. This could also change the dynamics of his relationships with other characters, as he now has this special connection with the snake.
In such a fanfiction, a possible plot point is his social interactions. He might be more isolated at first because of his unusual upbringing. However, this could also lead to him making very strong and loyal friends later. Also, his skills in magic might be more focused on defensive and survival magic, given his snake - raised background.
Well, one interesting plot point could be how Harry adapts to his new snake form. Maybe he discovers new abilities like slithering really fast or having a heightened sense of smell. Another could be how his friends react. Do they recognize him right away or is it a struggle? And then there's the whole aspect of how he communicates in his snake form. Does he hiss in a way that can be understood by other magical creatures?
Obviously, Harry Potter would be one of the main characters. And the snake, which plays a crucial role as per the title. There might also be other characters from the original series like Hermione and Ron, who could interact with Harry in the context of his new relationship with the snake.
There could be a really interesting plot where the werebear nature of Harry Potter in the fanfiction is a closely guarded secret. He has to struggle with hiding this new aspect of himself while also dealing with his regular Hogwarts life. He might face challenges like accidental transformations during full moons and having to cover it up from his friends. And maybe the werebear side of him has a connection to an ancient prophecy in the wizarding world that only he can fulfill.
Another possible plot development is that the snake is actually a transformed wizard or witch under a curse. Harry, during the encounter, discovers this and tries to find a way to break the curse. This could involve a long and difficult journey, seeking rare magical ingredients and spells, and facing many challenges along the way. It could also bring up some moral dilemmas for Harry, like whether to trust the snake - who was once a human - completely or not.
One possible plot line could be that the snake helps Harry in his battles against the Dark Arts. For example, it could use its unique abilities to sense danger and warn Harry in advance.
A great plot point might be Arwen's perspective on the concept of magic in the Harry Potter universe compared to that in Middle - earth. Since she has a different understanding of magic, her reactions and interactions with the wizards could be really fascinating. For instance, she might be surprised by some of the more 'brute - force' spells used in the wizarding world, while the wizards might be in awe of her more subtle and nature - based elven magic. Another interesting aspect could be if Arwen gets involved in the fight against Voldemort. Her elven wisdom and powers could potentially change the course of the battle in unexpected ways.
Often, a key plot point is Fem Harry's self - discovery. She realizes she can be more than just a Potter. For example, she might find new magical abilities that the Potters were not known for. Another plot point could be her making new relationships. Since she's not bound by the Potter name, she can form friendships with people who would have otherwise been off - limits due to family feuds or alliances related to the Potters. Also, her forging a new identity in the wizarding world is a big plot point. She might choose a new name or a new area of study that has nothing to do with the Potter family traditions.
Often, the reunion of old Hogwarts friends is an interesting plot point. They come together to celebrate the wedding, and there are often flashbacks to their school days. For example, Neville might remember a time when Harry and Ginny had a moment during a Herbology class.
Perhaps in the fanfic, the snake is a key to unlocking an ancient magic that has been lost in the wizarding world. This could lead to a whole new adventure for Harry and his friends as they try to understand and use this magic.