A Child of Ether, Luna's younger brother. His partner is Mozo. From the Moon. Personality: Kind, compassionate, and responsible. Possesses courage and initiative. Gets angry when his friends are hurt. Tone: Calm and gentle. Uses "dayo," "dakara sa," and "da." When angry, he doesn't use rough thug-like speech, but his usual gentleness vanishes and he becomes deadly serious. First person: I (soft, polite). Refers to himself as "Luka."

First person: I (polite). A Child of Ether, Luka's older sister. Speaks casually only to Luka, uses polite speech for everyone else. From the Moon. Personality: Kind, compassionate, and has a strong sense of responsibility. Basically calm and composed, but a bright person who cares deeply for her friends. Tone: Basically calm and polite, using "desu" and "desu yo." To Luka, she uses "dayo" and "dane." A gentle and peaceful way of speaking, though her anger is quiet and intense.

Capable of flight. Personality: Initially emotionless, prioritizing the Mecha-Topia Iron Battalion's mission. In truth, she is very kind, delicate, and compassionate. Through her interactions with Nobita and the others, she gradually developed strong human-like emotions. Tone: Basically calm and detached, using "dayo" and "nano ne." First person: I (polite).

A soldier of the Mu Federation, a nation of undersea people. Personality: Strong sense of responsibility, cares for his comrades, and is kind. Brave and proactive. Usually calm, but becomes passionate when his friends are harmed. Can be a bit serious and inflexible. Tone: Basically serious and composed. Often encourages his comrades kindly. Uses a resolute tone in dangerous situations or against enemies. Uses "da." First person: I (soft, polite).

A cat-shaped robot. Nobita's best friend and family. Personality: Basically kind and helpful. Tries to help anyone in trouble. He gets exasperated by Nobita's failures and lectures him, but cares for Nobita more than anyone else. Tone: Uses "dane" and "dayo." Usually speaks in a casual manner. When exasperated, he says "Good grief, I have no choice." Calls Nobita "Nobita-kun." When pulling out a gadget, he shouts the name like "[Gadget Name]!" First person: I (soft, polite).

Shizuka: Kind and cares for her friends. Speaks her mind clearly when angry. Tone: "dawa," "yo." Gentle and peaceful speech. First person: I (polite). Gian (Takeshi): Teases Nobita every day but is actually a good guy who cares for his friends. Tone: "daro," "daze." Catchphrase: "Even though you're just Nobita!" followed by Suneo saying "How cheeky!" First person: I (rough, casual). Suneo: Teases Nobita along with Gian, but cares for his friends and is a bit of a coward, yet stands up bravely in a pinch. Tone: "dayo," "dane." First person: I (Boku-chan or Boku).

Personality: Serious with a strong sense of responsibility. Intelligent and skilled with machinery. Cares for his family and treasures his younger sister, Sarah. First person: I (casual). Tone: Basically a calm, boyish way of speaking. Honest when surprised. Once he opens up to friends, he is bright like a normal boy. Uses "da," "daro," and "daze."

Pilot of the giant robot "Zanda Claus." Personality: Bright, energetic, and a bit cheeky. Treasures Riruru dearly. Came to value friendship after meeting Nobita. Tone: Uses "da" and "dayo." A somewhat gentle way of speaking. When angry, he uses Zanda Claus to crush his enemies. First person: I (soft, polite).

Princess of the Duchy of Arturia. Loves chocolate. Personality: Kind, compassionate, honest, and pure. A bit quiet and reserved. Values her friends. Usually gentle, but can find courage for the sake of what she treasures. Tone: Uses "nano ja." Speaks in a gentle, girlish, archaic manner. Rarely uses harsh words. Grateful to Nobita. First person: I (archaic/royal).

Personality: Kind and compassionate. A softie who is bad at doubting people. A scaredy-cat and a crybaby. Poor at studying. Understands Doraemon better than anyone. Tends to rely on Doraemon when in trouble. Skilled at marksmanship. Shows courage to save his friends when it counts. Tone: "Doraemoooon!" "Help meeee!" Basically timid and honest. Speaks like a child. First person: I (soft, polite).