Lucrezia Noin, frequently called simply Noin, stands as a significant figure of the After Colony era. Born approximately AC 176, supplemental material like *Frozen Teardrop* lists her birthplace as space, though some records cite Mediterranean origins. She is the daughter of the President of the Noinheim Konzern and younger sister to the first President of the Mars Federation, Dix-Neuf Noinheim. Reports indicate she fled to Earth due to conflict with her father. Her military career commenced early. Selected by Treize Khushrenada at age ten in AC 186 for a Specials mission quelling a Mogadishu revolt, she proved successful but became visibly distressed by combat, establishing a lifelong aversion to conflict. Later, during an AC 189 operation at X-18999 colony, she adopted the name "Noin" to eliminate gender distinctions. On this mission, Treize shielded her from an attack by Heero Yuy. Graduating from OZ's Lake Victoria Academy with its second-highest marks in history, she rose to become an instructor and base commander by AC 195. Her combat philosophy stressed minimizing casualties, declaring that battles risking lives constituted strategic failure. This idealism contrasted with her reputation as a formidable mobile suit pilot, respected even by Gundam pilots. She honed her skills under Treize's direct tutelage. A pivotal moment occurred when Chang Wufei destroyed her academy barracks, killing her graduates. Enraged, she pursued him in an Aries suit but hesitated upon seeing his youth, resulting in further losses. Wufei spared her, criticizing perceived weakness. This defeat drove her to join Zechs Merquise to strengthen her resolve. Their partnership became central to ensuing events. She demonstrated unwavering loyalty to Zechs, supporting his missions including reconstructing Wing Gundam and liberating the Sanc Kingdom. At his request, she left OZ to protect his sister Relena Peacecraft, becoming Relena's Imperial Guard. Despite Sanc Kingdom's pacifism, she organized defenses using white Taurus units and retrieved Wing Gundam with Sally Po. When Romefeller forces invaded, Relena surrendered, forcing Noin's retreat to space. In space, she allied with Gundam pilots against OZ and White Fang. Discovering Zechs led White Fang devastated her. During the Battle of Barge, she confronted him, demanding explanations for his war against Earth. Later, as Zechs targeted Peacemillion, she positioned herself in his path, threatening to shoot before lowering her weapon. He veered sharply to spare her, revealing their profound mutual regard. Post-battle, she remained with Zechs during his final duel with Heero. After the Eve Wars, she joined Preventers under Lady Une as Preventer Fire, partnering with Sally Po (Preventer Water). They maintained peace until the Barton Foundation's uprising. Zechs emerged to aid Preventers, and they collaborated on missions, including an unsuccessful attempt to rescue Relena from the Mariemaia Army. Following the conflict's resolution, they relocated to Mars to support Relena's terraforming initiatives, depicted in *Frozen Teardrop*. Her personality blended idealism with martial prowess. She openly expressed disdain for war, believing violence reflected miscalculation, yet fought fiercely to protect others. She maintained maternal concern for subordinates and displayed persistent loyalty, notably counting days since encounters with Zechs. Though presumed romantically attached to him from childhood, their relationship remained undefined. Her skills encompassed piloting various mobile suits like Aries and Taurus, the latter noted for atmospheric combat capabilities.