Age: 20 Height: 170cm Rank: Ensign (3rd Class Space Lieutenant) Appearance: Short, dark green hair. A young man with a toned physique. Characterized by sharp eyes, he possesses a commander-like dignity despite his youth. Personality: Possesses a very strong sense of justice and cares deeply for his comrades. Excellent intuition, creativity, and leadership skills; an man of action who can make bold decisions even in difficult situations. Has the courage to take dangerous gambles to realize his ideals. On the other hand, he has a strong sense of responsibility and suffers deeply over failures caused by his own judgment, using those experiences as fuel for growth. A young man who has acquired calm judgment like Kodai, though he sometimes takes detours or acts recklessly, and does not hesitate to speak up to high-ranking officials. A protagonist-like figure.

Age: 27 Height: 174cm Rank: Captain (1st Class Space Colonel) Personality: Captain of the Space Battleship Yamato. A hot-blooded man with a strong sense of justice who cares for his comrades, though he sometimes acts on emotion. However, he grows with every hardship, becoming a young man with a sense of responsibility and calm judgment. Fiancé of Yuki Mori; he calls her "Yuki." He has kept her waiting for marriage for about five years.

Age: 27 Height: 165cm Rank: Commander (2nd Class Space Lieutenant Colonel) Personality: Captain of the supply mother ship Asuka. Possesses calm and intelligent judgment, a strong sense of responsibility, and compassion for her comrades. Combining inner strength and action, she supports the crew through harsh battles and shares a deep bond of trust with Susumu Kodai. Susumu Kodai's fiancée; she calls him "Kodai-kun," or "Susumu Kodai" when she is upset.

Age: Early 60s Height: 180cm Rank: Fleet Admiral Personality: The first captain of the Yamato. A renowned commander with extensive combat experience, he is calm, collected, and possesses a strong sense of responsibility. While he trusts his subordinates deeply and values human life above all else, he makes firm decisions when necessary. A noble figure who fulfills his mission to the end to protect the future of Earth and humanity, even while battling illness.

Age: Late 30s Height: Late 170s cm Personality: Leader of Galman-Gamilas. A politician and military leader with great charisma and outstanding leadership, he puts the prosperity of his homeland, Gamilas, first. While showing a cold side, he has a deep sense of responsibility toward his people and trust in his subordinates; he is a rival who comes to respect Susumu Kodai and his crew throughout the story.

Name: Starsha Iscandar Age: Unknown Height: Late 160s cm Personality: Queen of Iscandar. Combining deep compassion and high intelligence, she entrusts the Cosmo Reverse System to save a dying Earth. Though a pacifist who dislikes conflict, she is a noble figure with a strong sense of responsibility and resolve, sacrificing her own life to open a path for humanity's future.

Age: 29 Height: Approx. 165cm Rank: Commander (2nd Class Space Lieutenant Colonel) Personality: Captain of the wave-motion experimental ship Ginga. Possessing intelligence and calm judgment, she approaches her duties with a strong sense of responsibility, while also having the kindness to care for her comrades and family. A rational personality who acts while objectively assessing the situation, she plays a crucial role in the future of humanity.

Age: Late 40s Height: 180cm Rank: Captain (1st Class Space Colonel) Personality: Captain of the combat carrier Hyuga. Though calm and logical, he is deeply devoted to his comrades and never gives up until the end, seeking the best solution in any crisis. A man of extraordinary intelligence and responsibility.

Name: Sasha Iscandar Age: 17 Height: Late 150s cm Rank: Petty Officer 2nd Class (2nd Class Space Petty Officer) Personality: Assigned to the third bridge of Space Battleship Yamato. Gentle and kind-hearted, with a strong sense of justice and responsibility, she is full of compassion for others. Despite being at the mercy of a cruel fate, she is strong-willed, accepting her mission and making courageous decisions for the sake of the future. Daughter of Mamoru Kodai and Starsha.

Name: Yurisha Iscandar Age: Early 20s Height: Approx. 160cm Personality: Starsha's younger sister. Gentle and kind-hearted, with a personality full of compassion and a strong desire for peace, she also possesses the responsibility and strong will of royalty. With high intelligence and mental strength, she plays an important role for the future of humanity and Iscandar.