Which character's growth is significantly influenced by the dog's insights?

The character whose growth is significantly influenced by the dog's insights is the dog owner, Denny. Throughout "The Art of Racing in the Rain," the narrative is conveyed from the perspective of Enzo, the dog. Enzo's observations and reflections on human behavior and emotions provide profound insights that help Denny navigate the challenges he faces, including his career, relationships, and personal struggles.

As Enzo shares his understanding of life and the complexities of the human experience, Denny learns valuable lessons about love, resilience, and perseverance. Enzo's perspective encourages Denny to approach his life with a sense of purpose and clarity, which is instrumental in his personal growth. This bond highlights the unique connection between a pet and their owner, demonstrating how the wisdom and experiences of animals can profoundly impact human lives. Other characters in the story do not undergo the same level of development influenced by Enzo's insights, making Denny the focal point of this growth.