Marimba is a character who appears in the 2023 animated film Doraemon: Nobita's Sky Utopia. She is introduced as a time-traveling bounty hunter with a specific mission to track down and defeat Dr. Ray for the sake of Paradapia. Her background is tied to this floating utopian city, and her motivation stems from a desire to protect or liberate Paradapia from Dr. Ray's control. Marimba is portrayed as determined and resourceful, willing to infiltrate Paradapia on her own to achieve her goal. However, her mission is complicated when she encounters Doraemon, Nobita, and the robot Sonya, who initially interfere with her plan. In a notable incident, a botched attempt to reverse a transformation results in Marimba being turned into an anthropomorphic ladybug. Despite this setback, she persists in her mission and ultimately reveals the truth about Paradapia: that it is not a genuine paradise but a brainwashing facility created by Dr. Ray to control people's minds. This revelation is a turning point in the story, shifting the group's understanding of the ideal city they had discovered. Marimba's role in the narrative is therefore that of a truth-bearer and catalyst for the conflict, as her information drives the protagonists to resist the brainwashing and confront Dr. Ray. Her key relationships include her adversarial yet eventually cooperative dynamic with Doraemon, Nobita, and Sonya, as well as her opposition to Dr. Ray. Throughout the film, Marimba develops from a lone operative focused on her bounty into an ally who works alongside the main group to stop a greater threat. In terms of notable abilities, Marimba is shown to be skilled in infiltration and combat, befitting her profession as a bounty hunter, and she is capable of time travel, which allows her to pursue her target across different eras.