Murrue Ramius, a technical officer in the Earth Alliance who contributed to Phase Shift armor development, abruptly assumed command of the Archangel when its crew was decimated during ZAFT’s attack on Heliopolis. Compassionate yet stern, she balanced empathy with a disciplined command style, once stripping a subordinate of leave privileges after overhearing disparaging remarks. Her leadership favored unorthodox strategies, demanding rapid adaptability from her crew during chaotic engagements.

In the First Alliance-PLANT War, she guided the Archangel through pivotal conflicts like Africa’s Desert Dawn Campaign and Orb’s defense. After uncovering the Earth Alliance’s intent to sacrifice her ship as a decoy in Operation Spitbreak, she defected, joining the Three Ships Alliance to thwart mutual destruction by extremist factions. The war’s end saw her grappling with the loss of Mu La Flaga, her romantic partner, who perished shielding the Archangel from a fatal strike. Adopting the alias Maria Bernes postwar, she worked in Orb’s Morgenröte shipyards, fostering a steady camaraderie with Andrew Waltfeld.

During the Second Alliance-PLANT War, she resurrected the upgraded Archangel to defend Orb’s neutrality. Confronted by Neo Roanoke—an amnesiac Mu La Flaga—she navigated emotional turmoil as his flirtations clashed with her lingering grief. Recognizing his restored identity during Orb’s battle, she reluctantly accepted his aid. At the Battle of Messiah, her tactical gambits against ZAFT’s Minerva culminated in Mu’s survival via the Akatsuki Gundam’s intervention, followed by a solemn salute exchanged with rival captain Talia Gladys.

Postwar, she commanded the Archangel under Compass, dismantling Blue Cosmos remnants. In the Foundation Conflict, her strategic acumen exposed covert threats within allied ranks during counterterrorism operations. Her career wove through combat, diplomacy, and reconstruction, defined by resilience amid fractured alliances and personal sacrifice.