A Monster in Paris

A shy projectionist who loves film and secretly loves Maud. His instinct to improvise when his projector belt breaks sets the story in motion, and his friendship with Raoul helps unlock a disaster-turned-adventure. Though reserved, he is driven by imagination and loyalty.

Emile's coworker at the cinema who becomes part of his emotional world. She navigates the social circles around the cabaret and cinema, offering warmth and presence. Her interactions with Raoul and Emile anchor the human stakes of the tale.

A cabaret singer at The Rare Bird who discovers the singing monster and gives it a home. She bridges the monster's world with human society and uses performance to reveal its gentleness. Her decisions shape the creature's fate and her own relationship with Raoul.

An exuberant inventor and delivery driver who fuels the adventure with his peculiar vehicle Catherine. He encourages Emile to express his feelings and becomes the practical hand behind the creature's emergence. His optimism and playfulness anchor the team.

The creature enlarged from a flea after the laboratory explosion, later revealed to be Francoeur who sings and enchants Lucille. He embodies the tension between danger and beauty, and his size shift drives the plot toward the final confrontation. His gentleness contrasts with the fear surrounding him.

A politically ambitious prefect who courts popularity and tries to exploit the creature for his campaign. He pursues Lucille and uses the press to shape public opinion, becoming the story's main antagonist in the pursuit of power. His plan crumbles as the truth about Francoeur is revealed.

An intelligent, calculating aide who investigates the monster and Maynott's actions. He provides the narration and frames the political maneuvering, ensuring justice rises over manipulation. His perspective guides the audience through the case and its implications.

Lucille's aunt who pushes a match between Lucille and Maynott to secure social advancement. She embodies the social machinations around Paris's nightlife and politics. Her schemes propel key plot points and heighten the sense of danger and romance.

A cabaret waiter who encounters the monster early on, providing a catalyst for Lucille's discovery of Francoeur's voice. His fright underscores the danger the creature initially poses to humans. He becomes a minor figure in the broader chase.

A neighborhood Florist who appears in the background during the post-credits scenes, helping to seed sunflowers as part of the plan to drain the Seine. His presence adds a touch of everyday life amid the chaos and spectacle.