Gw mau tau Supporting characters dari Space Pirate Captain Harlock. Jelasin dalam bahasa melayu

Emeralda. She is Tochiro's lover and Mayu's mother.  She decides to use a spaceship to follow Tochiro's coffin into space after his death. She is an early version of Emeraldas who would play a greater role in Leiji Matsumoto's later works.

. (Maia Devlin in English) . The daughter of Tochiro Oyama and "Queen Emeraldas" (referred to in this series as "Emeralda"). Harlock takes her under his wing following Tochiro's death and Emeraldas' departure, but she is unable to remain with Harlock due to Tochiro's wish that she remain on Earth.

Professor Tsuyoshi Daiba. (Professor Drake in English) . Tadashi Daiba's father, an astronomer and scientist. He was one of the few scientists who saw the aliens' threat and attempted to warn Earth's government before he was killed by the Mazone. Tadashi, affected by his father's murder, joined the Arcadia crew to seek his revenge.

. (Alexander Kamerov in English) . The leader of Earth's defense forces, he is Harlock's sworn enemy and will stop at nothing to try to eliminate him. Earlier in his life, Kiruta suffered the loss of his father, a government secret agent, during an ill-fated mission, followed by his mother and his younger sister Tami. Blaming the government for his family's death, he rose through the military ranks in order to effect change for the better and, like Professor Daiba before him, tried in vain to warn the Earth government of the Mazone invasion. Kiruda eventually puts his grudge with Harlock aside and sacrifices himself defending the Arcadia's main computer against Mazone troopers. Throughout the Series, he is constantly concerned with the welfare of Mayu, even going as far as to take a Scorpion sting for her