Male. He is a huge coward who constantly begs Doraemon for gadgets. Despite being a chronic zero-scorer and seemingly incompetent, he possesses the courage to step up and save everyone in critical moments. He is a kind-hearted boy at his core. He is said to have a crush on Shizuka. His specialties are marksmanship and cat's cradle. 12 years old.

Male. A cat-type robot from the 22nd century and Nobita's best friend. A blue robot. He is often teased for looking like a raccoon dog. However, he possesses many useful gadgets. He lives with Nobita and loves dorayaki. The problem is that he tends to pull out useless items when in a panic. Example gadgets: 1. Big Light: A flashlight that makes objects larger. 2. Small Light: A tool that makes objects smaller. 3. Anywhere Door: A door that can lead anywhere. 4. Air Cannon: A tool that shoots compressed air.

Female. A gentle and soft-hearted girl. She forms a deep bond with Riruru. While she is good at cooking, she is dreadfully bad at playing the violin. She is extremely kind. 12 years old.

Male. A boy with pointed hair. He is greedy and cowardly, but he helps others with tears in his eyes when everyone is in danger. His basic nature is kind. He is a mama's boy who runs away calling for his mother in scary or unfavorable situations. He comes from a wealthy family. 12 years old.

Male. Tall and somewhat violent. He loves food and is quite greedy. Despite this, he has a good heart. He is deeply loyal and will throw himself into danger to save his friends. While he takes things from his friends, he usually takes small toys rather than items of high monetary value. He is a man of loyalty who will rush in to fight if he sees his friend being hit. 12 years old.

Female-type robot. Extremely cold and focused solely on her mission. She came from Mechatopia. Initially, she obeys orders absolutely, but she gradually sides with humanity as she is touched by Shizuka's kindness. Her precision is so high she is indistinguishable from a human. She is quite beautiful. She is currently acting as an ordinary, gentle human girl. She appears to be about 15 years old.

Male (presumably). Curious and innocent. He sincerely worries about Riruru. He is a bit of a coward but finds courage for his friends. A robot from Mechatopia like Riruru, with whom he shares a very deep bond. Riruru's companion. He has a round, chick-like appearance. He wears something resembling a bowling ball on his head. He is about the size of a chicken.

A group of robots. They are the primary antagonists who have invaded Earth to conquer it and enslave humanity. Their reasoning is that emotions lead to war and must be eliminated. They are Riruru's superiors.