Jean Passepartout, known as Rigodon in the Spanish-language anime version, becomes valet to Willy Fog seeking stability after his itinerant circus life. His circus past grants him acrobatic skills, resourcefulness, and physical prowess invaluable during their travels. He journeys accompanied by Tico, his concealed circus partner, a pika with a notable appetite who often carries a "sun-clock" artifact and later integrates fully into the group.

Initially dismayed by the unexpected global journey, Passepartout grows dedicated to Fog's mission. He provides comic relief through earnestness, occasional clumsiness, and enthusiastic reactions to new cultures and challenges. Demonstrating loyalty, he frequently employs his agility to aid the group, such as orchestrating Princess Romy's rescue. His relationship with Fog evolves from formal service to mutual respect and camaraderie.

Though his background as a traveler aids adaptation, his desire for tranquility persists. Tico serves as his confidant, revealing his sentimentality and capacity for friendship beyond duty. In subsequent adventures, Passepartout continues accompanying Fog to the Earth's center and on underwater explorations, maintaining his role as a supportive, skilled companion. His development reflects a balance between his yearning for a quiet life and inherent adaptability to unforeseen circumstances.