Anonymous
cunning, and ambitious. Muntz becomes an antagonist as he pursues Carl's house in order to capture the bird that has taken refuge there. His actions lead to a series of intense confrontations with Carl and Russell.
adventurous, and supportive. Ellie's presence in the story is felt through her shared dreams with Carl and her eventual passing away due to illness. Her memory inspires Carl to embark on their longplanned adventure despite his age.
naive, and helpful. Russell becomes an unlikely companion to Carl on his journey to South America. Initially tasked with helping Carl, he finds himself caught up in the adventure and learns valuable lessons about friendship and perseverance.