After the One Year War, the girl who would become Four Murasame lost her family, and was adopted by the Murasame Research Lab. It was there were the Federation used and trained her to become an artificial New Type (or "Cyber - New Type"). The scientist in charge of the project erased all her memories from her previous life and just gave her number 'Four' as the name. Namika Coner, the nurse in charge of her, convinced her that working with the Titans and fighting the AEUG was the only way that she had for recover her memories. After escaping from Kennedy Space Center, Karaba's flagship, the Audhumla reached New Hong Kong for supplies. It was in this place where she meets AEUG pilot Kamille Bidan, and not knowing that he was an enemy, she feels bonded to him, since he is the first person who ever regarded Four as a person in her own right and not as a girl without memories who is bound to become a living weapon.
