Senbei Norimaki, widely known as "Dr. Slump", is an eccentric inventor calling Penguin Village home. He created the robot girl Arale Norimaki, introducing her variably as his sister or daughter. As Arale's creator, he assumes paternal responsibility despite frequently exhibiting lecherous behavior and questionable judgment. His inventions span from brilliant to absurd, regularly unleashing unintended chaos across the village. Senbei discovered the legendary wish-granting "Eye of Rainbow" treasure within Nanaba Castle. This find directly triggers the film's conflict when antagonist Bisna steals it to revive a devil and the Nanaba Kingdom, compelling Arale and her friends to retrieve it. His scientific endeavors often collide with the supernatural, including encounters with extraterrestrial beings and deities. After a prolonged courtship, Senbei married Midori Yamabuki and fathered their biological son, Turbo. This formed a blended family unit with Arale and the pet creature Gatchan. His personality merges sharp intellectual curiosity with profound social ineptitude, often imagining himself as more handsome and capable than reality. The "Dr. Slump" nickname humorously underscores perceived professional inadequacy. Beyond the film, Senbei maintains consistent traits: his fierce rivalry with the villainous Dr. Mashirito (modeled after Toriyama's real editor), comedic romantic misadventures, and makeshift parenting of Arale. He appears in *Dragon Ball* crossovers, repairing Son Goku's Dragon Radar and aiding against antagonists like Tao Pai Pai alongside Arale and Gatchan. His later career includes serving as Penguin Village's mayor, reflecting ongoing community involvement despite his flaws.