Doraemon is a robotic cat from the 22nd century, manufactured defective on September 3, 2112, at the Matsushiba Robot Factory (Model MS-903). A production malfunction damaged a critical screw, impairing his capabilities. Originally yellow, mice chewed off his ears. A failed repair attempt left him bald; subsequent depression caused him to consume a sorrow-inducing potion. His tears washed away the yellow paint, revealing his current blue color and cementing his intense musophobia (fear of mice) and iatrophobia (fear of medical check-ups). Sewashi Nobi, a descendant of Nobita Nobi, acquired Doraemon due to the substandard model's low cost. Sewashi later sent Doraemon back to the 20th century to improve young Nobita's life and alter the family's impoverished future. Doraemon possesses a four-dimensional pocket containing over 1,900 futuristic gadgets to aid Nobita, including frequently used items like the Time Machine, Take-Copter, Anywhere Door, and Invisible Cape. In "Nobita's the Night Before a Wedding," Doraemon uses the Time Machine to help a distraught Nobita verify his future marriage to Shizuka Minamoto. Arriving on the wedding eve, Doraemon discreetly monitors adult Nobita while ensuring his younger self avoids timeline interference. He employs the Truth Transmitter, inadvertently causing Shizuka to voice marriage doubts to her father, nearly disrupting events. Doraemon manages the situation to preserve the timeline, demonstrating his role as Nobita's protector and guide, emphasizing Nobita's inherent kindness. Doraemon exhibits distinct traits: intense fondness for dorayaki, occasional jealousy over feline companions, and strong reactions to being mistaken for a raccoon dog. His central relationship with Nobita involves loyalty, exasperation at Nobita's ineptitudes, and unwavering commitment to securing Nobita's better future. Despite being robotic, Doraemon displays empathy, particularly in mediating Nobita and Shizuka's relationship challenges. His sister robot, Dorami, occasionally assists but critiques his methods. Doraemon's foundational purpose remains consistent: to steer Nobita toward self-improvement and a successful life through gadgets and emotional support.