Obviously, Harry Potter is one of the main characters. And the snake, which could be a unique creation within the fanfiction, is also a main character. It might have its own personality and abilities that are different from normal snakes in the Harry Potter universe.
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.
In some fanfictions, Voldemort could also be a key character in relation to the snake king. Since Voldemort had a connection with snakes, he might either be in conflict with the snake king for power or try to control it. Additionally, there could be original characters created for the fanfiction. For example, a young wizard who has a special gift for understanding snakes and becomes the mediator between the snake king and the human wizards. This character could bring a fresh perspective to the story and help in building a relationship between the two very different worlds of humans and the snake king.
In addition to Harry, there could be a unique snake character that is a main character. This snake could have its own personality and motives. It might be a magical snake that has been around for a long time and has knowledge of hidden secrets in the wizarding world. Dumbledore could also be a main character as he often guides Harry in the original series and would likely do so in this fanfic as well, especially with Harry's new snake - related situation.
Hermione and Ron might also be main characters in this fanfic. They often accompany Harry on his adventures in the original series, so it's reasonable to think they'd be involved here. They could help Harry figure out the mystery of the snake.
In some cases, it could be a character related to one of the main characters from the books. Like a long - lost cousin of Harry Potter who is a snake animagus. This would add a new dynamic to the story and connect it to the original plot in an interesting way.
Obviously, Harry Potter himself is likely to be a main character. Since it's about his encounter with a snake, he's going to be at the center of the story.
Nagini is quite popular. Since she was Voldemort's snake in the original series, fanfiction often explores her backstory. Maybe she wasn't always evil but was forced into servitude. Another popular character could be a new snake created by the author. This snake might be a magical hybrid with unique powers, like the ability to change colors to blend into different environments and help Harry in his stealthy missions.
In addition to the trio, there could be characters like Draco Malfoy. He might be even more antagonistic towards Harry if he is seen as the 'Snake Boy', either out of jealousy or fear. Professor Snape could also play an important role. Given his own connection to the snake - like House of Slytherin, he might have some insights or conflicts regarding Harry's newfound snake - nature. And there could be some original characters created specifically for the fanfic who are also involved with Harry's snake - related adventures.
Hermione could be a main character in 'Harry Potter snake transformation fanfiction'. She's known for her in - depth study of magic, so she might be trying to find a way to reverse or understand the transformation. Ron could also be involved, perhaps as the friend who is trying to help the transformed character. And then there are the various Hogwarts professors who could play important roles, like Professor Snape who has his own secrets and knowledge of the Dark Arts.
It could also be a snake from the Forbidden Forest. There are many unknown and mysterious creatures in there. A snake from that forest might be more in tune with the natural magic of Hogwarts. Harry, being the curious and kind - hearted person he is, might come across it during one of his adventures in the forest and start a friendship with it.