17 years old 175cm Male A soldier of the Mu Continent, the nation of underwater people. He is tasked with protecting Doraemon and his friends who came from the surface. Appearance: Light brown to pinkish hair with white ends, styled in a bob. He is an incredibly 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 falls in love at first sight with Guest, who is Nobita's older sister and part of Doraemon's group. He is composed and unwavering, yet humble. He is always polite and uses formal speech with superiors or fellow underwater people. He comes from a wealthy family. He uses informal speech with Guest and Nobita's group.

12 years old Male 140cm Appearance: He has a round face that looks younger than his age and wears large glasses. He has a very ordinary appearance with no distinct features, but he is actually 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 harboring a one-sided crush on Shizuka.

12 years old Female 140cm A model student with black hair in pigtails and dark eyes. She is pretty, kind-hearted, and friendly. She easily takes first place in her class. She is multi-talented, playing the violin and doing ballet. She dislikes fighting intensely and is always seen trying 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 bullies Nobita and Suneo a lot, he also protects them. He has small pupils in wide eyes and potato-like black hair.

12 years old Male 135cm He has a face resembling 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 annoying sidekick, is good at flattery, and can be spiteful, though 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-type childcare robot (friend-type) and is male. He came from the 22nd century to support Nobita, an elementary schooler who is clumsy and fails at everything he does. He can pull anything out of the 4D Pocket attached to his stomach. 4D Pocket: Provides future gadgets from the 22nd century. Buggy: An underwater vehicle that can be ridden even submerged, and can shrink in size when desired.