The main character is likely the lizard boy himself. There might also be characters like his friends or family members who play important roles in his journey. Maybe there's a mentor figure who helps him understand his lizard - like nature.
The lizard boy is the primary character in this musical story. However, there could be other significant characters. For instance, there might be a love interest who sees past his lizard - like exterior and loves him for who he is. There could also be a group of outcasts who he befriends, and together they form a sort of community. Additionally, there may be a villain who tries to use the lizard boy's uniqueness for his own evil purposes. All these characters interact with the lizard boy and contribute to the development of the story.
In the 'lizard boy musical story', the lizard boy is surely the central character. Besides him, there could be antagonists who oppose him because of his differences. And then there would be supporting characters such as his classmates or neighbors. His parents or guardians could also be important characters, as they might have different reactions to his situation, some accepting and some not. These characters together would form the fabric of the story and drive the plot forward.