Aya Brea was born in Boston, Massachusetts on 20 November 1972. She had a sister named Maya who, along with her mother, died in an automobile accident around December 1977. After Maya's death, her organs were preserved, which allowed for one of her corneas to be transplanted into Aya, in 1986. At the same time, one of Maya's kidneys was transplanted into a young girl named Melissa Pearce. Unknown to any of the doctors, Maya's malevolent mitochondria began changing Aya and Melissa's genetic structure. As a young woman Aya studied criminology at the University of Virginia and was involved in their ROTC program, though no record of military service is ever mentioned within the game. She later became a detective with the fictional NYPD 17th precinct. Within the first six months of working at the precinct, Aya became involved in an event known as the New York Blockade Incident. As an officer, she held a sort of father/daughter relationship with her partner, Daniel "Bo" Dollis, a veteran cop who is protective of her. On December 24, 1997, Aya went on a date to an opera performance at Carnegie Hall, which starred Melissa Pearce as the lead. During the performance, Maya's advanced mitochondria, which had lain dormant in Melissa for eleven years, awakened and transformed her into Mitochondria Eve. As her first act against humankind, Eve killed everyone in Carnegie Hall via spontaneous human combustion, except for Aya who was immune to the effect. During the next six days, Aya fought Eve and the creatures she spawned, known as Neo-Mitochondrial Creatures or NMCs, all across Manhattan, greatly assisted by the incredible powers she started to exhibit. Aya would later discover that she was granted great power due to the fact that she possessed Maya's mitochondria (transferred to her body during the corneal transplant), but it was unable to take control of her as it did Melissa because of Aya's evolved cell nuclei. Aya fought and destroyed a strain of rapidly evolving mitochondria that threatened to enslave all humanity. Eventually, Aya engaged Eve in a showdown on Liberty Island, in which Eve was killed. After this however, she had to destroy The Ultimate Being, that Eve gave birth to. After an ongoing battle between her humanity and evolution, Aya successfully managed to destroy the creature with a little help from Daniel and Kunihiko Maeda (a Japanese scientist assisting them with advice in these matters). She soon became a hero among the government ranks for her courageous acts while few civilians are aware of the details of the event. (Source: Wikipedia)
