Yama Daiba, renamed Logan in English adaptations, navigates a path entangled with personal redemption, clashing ideologies, and profound metamorphosis. Once an operative of the authoritarian Gaia Sanction, he infiltrates the rogue space pirate Harlock’s crew on orders from his brother, Admiral Ezra Daiba, tasked with assassinating the captain. This mission arises from childhood guilt over an accident that paralyzed Ezra and condemned their shared love interest, Nami, to life support—a tragedy Yama blames himself for. His desperate quest for absolution wavers as he observes Harlock’s unyielding resolve and the Arcadia crew’s unshakable unity. Yama’s technical expertise, particularly his command of the ship’s weaponry and eventual mastery of its dark matter systems, secures his place among the crew. Yet his loyalty splinters upon uncovering Harlock’s endgame: detonating dark matter bombs to annihilate the universe and reboot existence, erasing humanity’s failures. This discovery thrusts Yama into a moral reckoning, torn between Harlock’s nihilistic crusade and the Gaia Sanction’s fabricated narratives. A turning point emerges when Yama stumbles upon a lone flower thriving amid Earth’s desolation—proof of life contradicting the Gaia Sanction’s propaganda of a restored planet. This fragile emblem of endurance reshapes his convictions, steering him from annihilation toward hope. He betrays his former allies, freeing the imprisoned Arcadia crew and confronting both Harlock and Ezra, championing Earth’s capacity for regeneration. In the climactic clash, Yama earns a facial scar mirroring Harlock’s, marking his evolution from manipulated agent to decisive leader. After dismantling the Gaia Sanction’s tyranny and thwarting Ezra’s vengeful pursuit, Harlock cedes command, handing Yama the universe’s fate via the bombs’ detonator and his iconic eyepatch. Rejecting cosmic erasure, Yama embraces preservation, ascending as the Arcadia’s new captain to navigate its enigmatic destiny. His physical transformation—from unblemished youth to a scarred figure adorned with Harlock’s eyepatch—mirrors his internal shift. Relationships defined by treachery, grief, and hard-won allegiance with the Arcadia crew underscore struggles for autonomy and redemption. Yama emerges as a linchpin between ruin and rebirth, his choices underscoring the power of agency in forging destiny.