Daisuke Yamori operates as assistant to Yayoi Yukino while secretly pledging allegiance to the LaMetal forces. His proximity to Yayoi contrasts sharply with his duty to report to LaMetal's Earth operations commander, Dr. Fara. This dual loyalty breeds underlying tension, escalating as Yayoi resists LaMetal's agenda. Despite their long association, Yamori withholds his knowledge of LaMetal's true intentions—including the fabricated planetary collision scenario designed to displace humanity. When conflict erupts between Earth's defenders and LaMetal's invasion fleet, Yamori faces a decisive choice. Following Yayoi's explicit refusal to cooperate with the takeover, he declares his loyalty lies solely with her, rejecting Fara's authority. In a critical battle maneuver, he pilots his aircraft directly into Fara's flagship, inflicting significant damage. This sacrificial act results in Yamori's death and marks a complete break from his obligations to LaMetal. Yamori possesses a longstanding connection to the Millennial Queens, with earlier generations of his lineage serving as protectors. His LaMetal identity, La Els Milliue, reflects deeper ties to the alien hierarchy. Though reserved in expressing his feelings, he demonstrates unrequited affection toward Yayoi, secondary to his role-driven actions. His physical appearance features consistent green hair and blue eyes. His narrative arc, illustrating themes of loyalty and betrayal within the larger conflict, concludes through self-sacrifice as he ultimately sides with Earth despite his origins.