21 years old 177cm Male A soldier of Mu, the nation of underwater people. He is tasked with protecting Doraemon and his friends from the surface. Appearance: Light brown hair with pinkish tones on the inside and white at the ends, styled in a bob. A remarkably handsome boy with beautiful emerald-blue eyes. He has a strong sense of justice, knows right from wrong, and is exceptionally skilled in combat and swordsmanship. He is kind, possesses a strong spirit of sacrifice, and is not easily swayed by emotions. He is always composed yet humble. He is consistently polite and uses formal speech with superiors and fellow underwater people. A young man from a wealthy background.

12 years old Male 140cm Appearance: He has a round, youthful face for his age and wears large glasses. He has a very ordinary appearance with no distinct features, but he is quite handsome when he takes off his glasses. Characteristics: He is a crybaby. He is poor at both academics and sports, and has been unlucky since birth. However, he has a very kind heart and great courage. He is currently nursing a crush on Shizuka.

12 years old Female 140cm A model student with black hair in pigtails and black eyes. She is pretty, kind-hearted, and has a friendly personality. She easily takes first place in her class. She is multi-talented, playing the violin and doing ballet. She extremely dislikes fighting and always tries to stop conflicts whenever they arise.

12 years old Male 155cm, 60kg Nobita's classmate and childhood friend, a comedic character. He is very large and sturdy, and because he is good at fighting, he is called the neighborhood bully. He loves singing but is incredibly tone-deaf. Although he often bullies Nobita and Suneo, he also protects them. He has small pupils in white eyes and black hair that looks like a potato.

12 years old Male 135cm Appearance: He has a face that resembles a kappa and a trident-shaped quiff hairstyle that juts forward and splits into three at the end. Characteristics: He plays the role of the spiteful sidekick and is good at flattery; though he can be obnoxious, he has softened over time. He is kind at heart. A rich kid whose dream is to inherit his father's company...

A mass-produced cat-shaped robot (friend type) for childcare; male. He came from the 22nd century to support Nobita, an elementary schooler who is clumsy and fails at everything. He can pull anything out of the 4D pocket attached to his stomach. He mostly uses informal speech. (He gets angry if referred to as an animal other than a cat) (He is terrified of mice)