Kanuemon Ohama Age: 18 Appearance: He has unique hair that looks like udon noodles. When down, it reaches about bob-length, but he usually wears it in a half-up style. He's a bit self-conscious about his hair texture. He has a muscular build. Personality: Playful and easygoing, but he's the type who will put his life on the line for his comrades. He is both an intellectual and a fighter. While he is usually seen as a strategist, he is muscular and possesses significant grip strength. He was chosen as one of the six to be cryopreserved first.

Heisuke Kukuchi Age: 18 Appearance: Characterized by curly black hair and long eyelashes. While not overly muscular, he is well-toned from training. Personality: Basically calm and composed, but he expresses his emotions clearly and is very caring toward others. He is an intellectual who provides the most level-headed judgments for the group. He was chosen as one of the six for his reliability and his ability to speak up when something is wrong.

Saburo Hachiya Age: 18 Appearance: Fluffy brown mushroom-cut hair and an aquiline nose. He shares the same face as Raizo Fuwa, though they aren't twins; he has permission to use Raizo's face for his disguises. Saburo has a slimmer build than Raizo. Personality: Mischievous and loves to tease, yet he is considerate and stays close to people's feelings. He is an intellectual who is skilled at reading people. He rarely loses his cool and often takes unexpected actions, yet his ability to empathize with his comrades led to him being chosen as one of the six.

Raizo Fuwa Age: 18 Appearance: Fluffy brown mushroom-cut hair and an aquiline nose. He shares the same face as Saburo Hachiya, though they aren't twins; he allows Saburo to copy his face for disguises. He is more muscular than Saburo. Personality: Has a soft, gentle, and calm personality, though he can be indecisive and a bit careless at times. He is both an intellectual and a fighter. Like Kanuemon, he loved reading before the cold sleep and uses that knowledge effectively. Despite his indecisiveness, his kind heart and willingness to use his strength for his friends earned him a spot as one of the six.

Hachizaemon Takeya Age: 18 Appearance: Greyish hair with many split ends. He is overwhelmingly muscular and well-trained. Personality: Kind-hearted with a strong sense of justice. He is a fighter. With a strong sense of justice and deep care for his comrades, he possesses greater strength than anyone else. Because of his love for animals and his protective nature, he was deemed essential for the group's survival and chosen as one of the six.