Who could be the main character in 'Harry Potter Snake in Lions Clothing' fanfiction?

Perhaps there's a plot where a magical creature that has the appearance of a snake is disguised as a lion - like being. It could be used as a sort of spy within the Gryffindor common room. This would lead to all sorts of chaos as it tries to gather information for an unknown Slytherin - related plot.

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 would be one of the main characters. Then, the King of Lions himself could be a central character. He could be a majestic and wise being with his own backstory and motives. Hermione and Ron could also be important characters. Hermione might be intrigued by the new form of magic in the lion realm and Ron could be there for support and comic relief, as he often is in the original series.

Ron could also be the main character. He has his own courage and loyalty. He could be the one who has an unexpected connection with the poisonous snake, like being able to communicate with it in a special way that no one else can.

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.

It could be Nagini. Even though in the original series she was more of a servant to Voldemort, in the fanfiction, she could have a different personality and form a bond with Harry.

The main character is Harry Potter. The lions are also key characters. There might be an old wise lion, like a Dumbledore figure among the lions. And there could be a young and adventurous lion cub that becomes Harry's best friend while he is growing up. There might also be some wizard characters who later interact with Harry when he discovers the wizarding world.

It could be a dark wizard who also has the ability to communicate with snakes and wants to use this power for evil. He might be jealous of Harry's connection with the snake and try to disrupt it or steal the snake for his own dark purposes.

The main antagonist could be a Slytherin student who has a vendetta against Harry. When they see Harry with the snake, which they believe should belong to a Slytherin, they start causing trouble for Harry. They might try to frame Harry for using dark magic with the snake or try to steal the snake to prove their superiority over Harry.

It could be a dark wizard who also has an interest in the snake. Maybe he wants to use the snake's powers for evil purposes, like opening a portal to a dark dimension or controlling other magical creatures. So he becomes the main obstacle for Harry as he tries to protect the snake.