Troy's bond with Willa is central to the narrative, as the siblings share a close relationship despite their contrasting personalities. Troy's impulsiveness often leads him into difficult situations, requiring Willa's intervention and support to navigate the hardships they encounter.
Throughout the story, Troy's mischievous nature, adventurous spirit, and unwavering loyalty to his family contribute to the overall development of the plot. He acts as a catalyst for several pivotal events, highlighting his importance in the journey of the characters.
Troy represents the youthful innocence and carefree spirit that contrasts with the harsh realities Willa faces during the course of the novel. His enthusiasm and determination to help his sister emphasize his genuine love and concern for her well-being.
As "Downriver" progresses, Troy's actions and decisions influence the fate of the characters, shaping the direction of the story. His role showcases the complexities of sibling relationships, highlighting the strength of familial bonds in times of uncertainty and change.