Colonel Alexander Kamerov, also identified as Mitsuru Kiruda in Japanese records, commands Earth's defense forces against the Mazone alien invasion. A history marked by tragedy fuels his career, having lost his father (a government secret agent), mother, and younger sister Tami due to governmental failures. This profound loss drives his ascent through the military ranks, motivated by a determination to reform Earth's governance and avert future disasters.

Kamerov begins as Captain Harlock's sworn enemy, echoing Professor Daiba's unsuccessful warnings to Earth's apathetic government about the Mazone threat. His antagonism toward Harlock arises from their opposing strategies against Earth's corruption: Kamerov seeks change from within the system, while Harlock operates as an outlaw outside it. Despite this rivalry, Kamerov consistently demonstrates concern for Mayu Ōyama's safety, even intercepting a deadly Scorpion sting meant for her.

As the Mazone assault intensifies, Kamerov's focus shifts. Acknowledging Harlock's effectiveness against the alien enemy, he temporarily suspends their conflict. This fragile alliance peaks when Kamerov makes a final stand, sacrificing himself to protect the Arcadia's main computer from attacking Mazone troopers. This decisive act ensures Harlock's ability to continue the fight. Kamerov's death signifies a crucial transition from institutional adversary to heroic collaborator against humanity's shared foe.

Kamerov's appearance and role in other *Captain Harlock* adaptations, including films (*Arcadia of My Youth*, 2013 CGI film), OVAs (*Endless Odyssey*, *Harlock Saga*), or spin-offs (*Gun Frontier*, *Cosmo Warrior Zero*), remain undocumented.