Dorami, a robotic character and sister to Doraemon, works in the 22nd century alongside Sewashi—descendant of Nobita Nobi—and his peers. In a 1993 short film, she spearheads a Cretaceous-era expedition to resolve debates on dinosaur-bird evolution through meticulous observation and time-travel. Equipped with advanced gadgets, she collaborates with Sewashi’s friends, whose dynamics mirror those of Gian and Suneo, balancing educational missions with group coordination. The narrative expands Sewashi’s personality beyond his typical supportive role, emphasizing Dorami’s ability to guide complex team interactions.

Her scientific inquiry intersects with encounters involving Maiasaura herds and Tyrannosaurus predators, weaving biological concepts like dinosaur parental care into the adventure. The story blends lighthearted exploration with suspenseful predator chases and heartfelt moments, showcasing her role in narratives that shift between playful curiosity and emotionally charged stakes.