Would you describe John Wilson as a main character or a minor character In Zebra story?

In the story "Zebra," John Wilson serves as a main character. He plays a crucial role in the narrative as the art teacher who influences the protagonist, Zebra, helping him navigate his struggles with self-identity and the impact of his past. Wilson's interactions and guidance are central to Zebra's development, making him essential to the story's themes and emotional depth.