Noramyako, a cat robot, profoundly shaped Doraemon's life before he left for the past. She first encountered him rescuing him from a plunge into an industrial furnace just after his production, an act sparking Doraemon's instant romantic attachment. She encouraged his enrollment at the Robot Academy, where they became classmates. Throughout their studies, she repeatedly shielded Doraemon from bullies Jaides and Sunekuchi, who targeted him over his malfunctions and poor performance.

She crucially assembled the Doraemons group by introducing Doraemon to six others: Dora the Kid, Dora-rinho, Wang Dora, Dora-nichov, Dora Med III, and El Matadora. This team united to free the imprisoned Jaides and Sunekuchi, forging lasting bonds. Near graduation, Noramyako provided Doraemon emotional support and introduced him to dorayaki, which became his lifelong favorite snack. Her own graduation audition displayed her ballet talent, paving her path to a successful career as a dancer.

Later, visiting Doraemon in hospital after ear-repair surgery (damaged by a robotic mouse), she involuntarily laughed at his earless state, plunging him into profound distress. This contributed to Doraemon accidentally consuming "The Bane of Gloom," altering his voice and turning his yellow coating blue. She apologized after he rescued Sewashi Nobi from antagonists, leading to their reconciliation.

Years later, during a trip to the future with Nobita, they discovered Noramyako decommissioned due to obsolescence. Nobita suggested repairs. Using her original parts at a robot factory reactivated her, but the process erased her memories. She laughed at Doraemon's appearance once more before departing. Her memories were later restored, enabling another reconciliation with Doraemon.