Who could be the main character in 'Harry Potter and the Poisonous Snake Fanfiction' other than Harry Potter?

Well, one possible interesting plot could be the discovery of a new kind of magic related to the poisonous snake. Maybe the snake has a unique power that can either help or harm the wizarding world.

It could still be Harry Potter himself. He has a history of facing dangerous creatures and dark magic, so it would be natural for him to take on the challenge of the deadly snake.

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.

In Harry Potter fanfiction, a 'poisonous kiss' could be a creative and often dark or dangerous plot device. It might involve a kiss that has a harmful magical effect, perhaps used by a villain to incapacitate or harm a character. For example, a dark wizard might use a poisonous kiss to put a curse on an unsuspecting victim, like a love spell gone wrong that instead of bringing love, brings harm.

The snake's help could represent an unexpected alliance. In the Harry Potter series, snakes are often seen as symbols of Slytherin, which is usually at odds with Harry. So it's significant as it breaks the stereotype of enmity between Gryffindor (represented by Harry) and Slytherin.

The snake might use its ability to move stealthily. It could spy on the enemies for Harry Potter. For example, it can slither into hidden places where humans can't easily reach and gather important information.

Maybe it's an anonymous gift from someone who has been observing Harry. This person could be a former student of Hogwarts who has a special connection to snakes and sees that Harry has a kind heart and would take good care of the snake. So they leave the snake for Harry to find with a simple note that just says 'For Harry Potter'.

Another option could be a new character. A transfer student, perhaps, who is really a Slytherin at heart but is placed in Gryffindor by mistake. This character then has to keep up the pretense of being a Gryffindor while dealing with their true Slytherin nature.

Snake magic in Harry Potter fanfiction can be used to show a character's dark side. Since snakes are often associated with Slytherin and dark magic in the original series, in fanfiction, a character using snake magic might be on a path towards the dark arts. For example, they could use snake magic to control others or gain power in a more underhanded way.

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.