Noin was a friend of Zechs Merquise, the pilot of the Talgeese and Epyon, and was one of the few people who knew his real identity. They had met at the Lake Victoria Military Academy, where Noin later became an instructor. Noin was always second to Zechs, and he believed that she was just trying to make him look better.
After Wufei blew up most of the base, Noin went with Zechs to help him rebuild the Talgeese, a twenty year old mobile suit. Since Noin was so close to Zechs, she knew that Relena was his sister, so she asked Treize Kushranada if she could protect her.
Treize acquiesced, and Noin rescued Relena from Lady Une's soldiers. She kept Relena out of trouble and away from Une. After Relena returned to her home, Noin found Heero and Trowa and took them to Antarctica where Zechs wanted to finish his duel with Heero.
During the duel, Relena showed up and encouraged Heero to kill Zechs, but Noin demanded that she stop. She then explained to the princess that Zechs was her brother and that wishing for his death was a horrible thing. Several carriers full of Romefeller's mobile suits interrupted the duel, and Zechs flew off to battle them.
When Sally Po was captured by OZ, Noin helped her escape, and they went into space to unite the gundam pilots. During the final battle against White Fang, Noin prevented Zechs from destroying the Peacemillion by blocking his path, but she did not attempt to stop him from continuing to fight the gundams.
Noin is a strong woman, because she managed to be a respected pilot, even though she is a woman. She also has the guts to stand directly in front of a charging Epyon, not knowing if Zechs loved her enough to not kill her.
